added more content

node_modules/katex/LICENSE.txt

@@ -0,0 +1,27 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Khan Academy
+
+This software also uses portions of the underscore.js project, which is
+MIT licensed with the following copyright:
+
+Copyright (c) 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative
+Reporters & Editors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

node_modules/katex/README.md

@@ -0,0 +1,68 @@
+# [<img src="https://khan.github.io/KaTeX/katex-logo.svg" width="130" alt="KaTeX">](https://khan.github.io/KaTeX/) [![Build Status](https://travis-ci.org/Khan/KaTeX.svg?branch=master)](https://travis-ci.org/Khan/KaTeX)
+
+[![Join the chat at https://gitter.im/Khan/KaTeX](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/Khan/KaTeX?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
+KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web.
+
+ * **Fast:** KaTeX renders its math synchronously and doesn't need to reflow the page. See how it compares to a competitor in [this speed test](http://jsperf.com/katex-vs-mathjax/).
+ * **Print quality:** KaTeX’s layout is based on Donald Knuth’s TeX, the gold standard for math typesetting.
+ * **Self contained:** KaTeX has no dependencies and can easily be bundled with your website resources.
+ * **Server side rendering:** KaTeX produces the same output regardless of browser or environment, so you can pre-render expressions using Node.js and send them as plain HTML.
+
+KaTeX supports all major browsers, including Chrome, Safari, Firefox, Opera, and IE 8 - IE 11.  A list of supported  commands can be on the [wiki](https://github.com/Khan/KaTeX/wiki/Function-Support-in-KaTeX).
+
+## Usage
+
+You can [download KaTeX](https://github.com/khan/katex/releases) and host it on your server or include the `katex.min.js` and `katex.min.css` files on your page directly from a CDN:
+
+```html
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/katex.min.css">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/katex.min.js"></script>
+```
+
+#### In-browser rendering
+
+Call `katex.render` with a TeX expression and a DOM element to render into:
+
+```js
+katex.render("c = \\pm\\sqrt{a^2 + b^2}", element);
+```
+
+If KaTeX can't parse the expression, it throws a `katex.ParseError` error.
+
+#### Server side rendering or rendering to a string
+
+To generate HTML on the server or to generate an HTML string of the rendered math, you can use `katex.renderToString`:
+
+```js
+var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}");
+// '<span class="katex">...</span>'
+```
+
+Make sure to include the CSS and font files, but there is no need to include the JavaScript. Like `render`, `renderToString` throws if it can't parse the expression.
+
+#### Rendering options
+
+You can provide an object of options as the last argument to `katex.render` and `katex.renderToString`. Available options are:
+
+- `displayMode`: `boolean`. If `true` the math will be rendered in display mode, which will put the math in display style (so `\int` and `\sum` are large, for example), and will center the math on the page on its own line. If `false` the math will be rendered in inline mode. (default: `false`)
+- `throwOnError`: `boolean`. If `true`, KaTeX will throw a `ParseError` when it encounters an unsupported command. If `false`, KaTeX will render the unsupported command as text in the color given by `errorColor`. (default: `true`)
+- `errorColor`: `string`. A color string given in the format `"#XXX"` or `"#XXXXXX"`. This option determines the color which unsupported commands are rendered in. (default: `#cc0000`)
+
+For example:
+
+```js
+katex.render("c = \\pm\\sqrt{a^2 + b^2}", element, { displayMode: true });
+```
+
+#### Automatic rendering of math on a page
+
+Math on the page can be automatically rendered using the auto-render extension. See [the Auto-render README](contrib/auto-render/README.md) for more information.
+
+## Contributing
+
+See [CONTRIBUTING.md](CONTRIBUTING.md)
+
+## License
+
+KaTeX is licensed under the [MIT License](http://opensource.org/licenses/MIT).

node_modules/katex/cli.js

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+#!/usr/bin/env node
+// Simple CLI for KaTeX.
+// Reads TeX from stdin, outputs HTML to stdout.
+/* eslint no-console:0 */
+
+var katex = require("./");
+var input = "";
+
+// Skip the first two args, which are just "node" and "cli.js"
+var args = process.argv.slice(2);
+
+if (args.indexOf("--help") !== -1) {
+    console.log(process.argv[0] + " " + process.argv[1] +
+                " [ --help ]" +
+                " [ --display-mode ]");
+
+    console.log("\n" +
+                "Options:");
+    console.log("  --help            Display this help message");
+    console.log("  --display-mode    Render in display mode (not inline mode)");
+    process.exit();
+}
+
+process.stdin.on("data", function(chunk) {
+    input += chunk.toString();
+});
+
+process.stdin.on("end", function() {
+    var options = { displayMode: args.indexOf("--display-mode") !== -1 };
+    var output = katex.renderToString(input, options);
+    console.log(output);
+});

node_modules/katex/dist/README.md

@@ -0,0 +1,68 @@
+# [<img src="https://khan.github.io/KaTeX/katex-logo.svg" width="130" alt="KaTeX">](https://khan.github.io/KaTeX/) [![Build Status](https://travis-ci.org/Khan/KaTeX.svg?branch=master)](https://travis-ci.org/Khan/KaTeX)
+
+[![Join the chat at https://gitter.im/Khan/KaTeX](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/Khan/KaTeX?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
+KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web.
+
+ * **Fast:** KaTeX renders its math synchronously and doesn't need to reflow the page. See how it compares to a competitor in [this speed test](http://jsperf.com/katex-vs-mathjax/).
+ * **Print quality:** KaTeX’s layout is based on Donald Knuth’s TeX, the gold standard for math typesetting.
+ * **Self contained:** KaTeX has no dependencies and can easily be bundled with your website resources.
+ * **Server side rendering:** KaTeX produces the same output regardless of browser or environment, so you can pre-render expressions using Node.js and send them as plain HTML.
+
+KaTeX supports all major browsers, including Chrome, Safari, Firefox, Opera, and IE 8 - IE 11.  A list of supported  commands can be on the [wiki](https://github.com/Khan/KaTeX/wiki/Function-Support-in-KaTeX).
+
+## Usage
+
+You can [download KaTeX](https://github.com/khan/katex/releases) and host it on your server or include the `katex.min.js` and `katex.min.css` files on your page directly from a CDN:
+
+```html
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/katex.min.css">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/katex.min.js"></script>
+```
+
+#### In-browser rendering
+
+Call `katex.render` with a TeX expression and a DOM element to render into:
+
+```js
+katex.render("c = \\pm\\sqrt{a^2 + b^2}", element);
+```
+
+If KaTeX can't parse the expression, it throws a `katex.ParseError` error.
+
+#### Server side rendering or rendering to a string
+
+To generate HTML on the server or to generate an HTML string of the rendered math, you can use `katex.renderToString`:
+
+```js
+var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}");
+// '<span class="katex">...</span>'
+```
+
+Make sure to include the CSS and font files, but there is no need to include the JavaScript. Like `render`, `renderToString` throws if it can't parse the expression.
+
+#### Rendering options
+
+You can provide an object of options as the last argument to `katex.render` and `katex.renderToString`. Available options are:
+
+- `displayMode`: `boolean`. If `true` the math will be rendered in display mode, which will put the math in display style (so `\int` and `\sum` are large, for example), and will center the math on the page on its own line. If `false` the math will be rendered in inline mode. (default: `false`)
+- `throwOnError`: `boolean`. If `true`, KaTeX will throw a `ParseError` when it encounters an unsupported command. If `false`, KaTeX will render the unsupported command as text in the color given by `errorColor`. (default: `true`)
+- `errorColor`: `string`. A color string given in the format `"#XXX"` or `"#XXXXXX"`. This option determines the color which unsupported commands are rendered in. (default: `#cc0000`)
+
+For example:
+
+```js
+katex.render("c = \\pm\\sqrt{a^2 + b^2}", element, { displayMode: true });
+```
+
+#### Automatic rendering of math on a page
+
+Math on the page can be automatically rendered using the auto-render extension. See [the Auto-render README](contrib/auto-render/README.md) for more information.
+
+## Contributing
+
+See [CONTRIBUTING.md](CONTRIBUTING.md)
+
+## License
+
+KaTeX is licensed under the [MIT License](http://opensource.org/licenses/MIT).

node_modules/katex/dist/contrib/auto-render.min.js

@@ -0,0 +1 @@
+(function(e){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=e()}else if(typeof define==="function"&&define.amd){define([],e)}else{var t;if(typeof window!=="undefined"){t=window}else if(typeof global!=="undefined"){t=global}else if(typeof self!=="undefined"){t=self}else{t=this}t.renderMathInElement=e()}})(function(){var e,t,r;return function n(e,t,r){function a(o,l){if(!t[o]){if(!e[o]){var f=typeof require=="function"&&require;if(!l&&f)return f(o,!0);if(i)return i(o,!0);var d=new Error("Cannot find module '"+o+"'");throw d.code="MODULE_NOT_FOUND",d}var s=t[o]={exports:{}};e[o][0].call(s.exports,function(t){var r=e[o][1][t];return a(r?r:t)},s,s.exports,n,e,t,r)}return t[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)a(r[o]);return a}({1:[function(e,t,r){var n=e("./splitAtDelimiters");var a=function(e,t){var r=[{type:"text",data:e}];for(var a=0;a<t.length;a++){var i=t[a];r=n(r,i.left,i.right,i.display||false)}return r};var i=function(e,t){var r=a(e,t);var n=document.createDocumentFragment();for(var i=0;i<r.length;i++){if(r[i].type==="text"){n.appendChild(document.createTextNode(r[i].data))}else{var o=document.createElement("span");var l=r[i].data;try{katex.render(l,o,{displayMode:r[i].display})}catch(f){if(!(f instanceof katex.ParseError)){throw f}console.error("KaTeX auto-render: Failed to parse `"+r[i].data+"` with ",f);n.appendChild(document.createTextNode(r[i].rawData));continue}n.appendChild(o)}}return n};var o=function(e,t,r){for(var n=0;n<e.childNodes.length;n++){var a=e.childNodes[n];if(a.nodeType===3){var l=i(a.textContent,t);n+=l.childNodes.length-1;e.replaceChild(l,a)}else if(a.nodeType===1){var f=r.indexOf(a.nodeName.toLowerCase())===-1;if(f){o(a,t,r)}}}};var l={delimiters:[{left:"$$",right:"$$",display:true},{left:"\\[",right:"\\]",display:true},{left:"\\(",right:"\\)",display:false}],ignoredTags:["script","noscript","style","textarea","pre","code"]};var f=function(e){var t;var r;for(var n=1,a=arguments.length;n<a;n++){t=arguments[n];for(r in t){if(Object.prototype.hasOwnProperty.call(t,r)){e[r]=t[r]}}}return e};var d=function(e,t){if(!e){throw new Error("No element provided to render")}t=f({},l,t);o(e,t.delimiters,t.ignoredTags)};t.exports=d},{"./splitAtDelimiters":2}],2:[function(e,t,r){var n=function(e,t,r){var n=r;var a=0;var i=e.length;while(n<t.length){var o=t[n];if(a<=0&&t.slice(n,n+i)===e){return n}else if(o==="\\"){n++}else if(o==="{"){a++}else if(o==="}"){a--}n++}return-1};var a=function(e,t,r,a){var i=[];for(var o=0;o<e.length;o++){if(e[o].type==="text"){var l=e[o].data;var f=true;var d=0;var s;s=l.indexOf(t);if(s!==-1){d=s;i.push({type:"text",data:l.slice(0,d)});f=false}while(true){if(f){s=l.indexOf(t,d);if(s===-1){break}i.push({type:"text",data:l.slice(d,s)});d=s}else{s=n(r,l,d+t.length);if(s===-1){break}i.push({type:"math",data:l.slice(d+t.length,s),rawData:l.slice(d,s+r.length),display:a});d=s+r.length}f=!f}i.push({type:"text",data:l.slice(d)})}else{i.push(e[o])}}return i};t.exports=a},{}]},{},[1])(1)});

node_modules/katex/dist/katex.css

@@ -0,0 +1,976 @@
+@font-face {
+  font-family: 'KaTeX_AMS';
+  src: url('fonts/KaTeX_AMS-Regular.eot');
+  src: url('fonts/KaTeX_AMS-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_AMS-Regular.woff2') format('woff2'), url('fonts/KaTeX_AMS-Regular.woff') format('woff'), url('fonts/KaTeX_AMS-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Caligraphic';
+  src: url('fonts/KaTeX_Caligraphic-Bold.eot');
+  src: url('fonts/KaTeX_Caligraphic-Bold.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Caligraphic-Bold.woff2') format('woff2'), url('fonts/KaTeX_Caligraphic-Bold.woff') format('woff'), url('fonts/KaTeX_Caligraphic-Bold.ttf') format('truetype');
+  font-weight: bold;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Caligraphic';
+  src: url('fonts/KaTeX_Caligraphic-Regular.eot');
+  src: url('fonts/KaTeX_Caligraphic-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Caligraphic-Regular.woff2') format('woff2'), url('fonts/KaTeX_Caligraphic-Regular.woff') format('woff'), url('fonts/KaTeX_Caligraphic-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Fraktur';
+  src: url('fonts/KaTeX_Fraktur-Bold.eot');
+  src: url('fonts/KaTeX_Fraktur-Bold.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Fraktur-Bold.woff2') format('woff2'), url('fonts/KaTeX_Fraktur-Bold.woff') format('woff'), url('fonts/KaTeX_Fraktur-Bold.ttf') format('truetype');
+  font-weight: bold;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Fraktur';
+  src: url('fonts/KaTeX_Fraktur-Regular.eot');
+  src: url('fonts/KaTeX_Fraktur-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Fraktur-Regular.woff2') format('woff2'), url('fonts/KaTeX_Fraktur-Regular.woff') format('woff'), url('fonts/KaTeX_Fraktur-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Main';
+  src: url('fonts/KaTeX_Main-Bold.eot');
+  src: url('fonts/KaTeX_Main-Bold.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Main-Bold.woff2') format('woff2'), url('fonts/KaTeX_Main-Bold.woff') format('woff'), url('fonts/KaTeX_Main-Bold.ttf') format('truetype');
+  font-weight: bold;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Main';
+  src: url('fonts/KaTeX_Main-Italic.eot');
+  src: url('fonts/KaTeX_Main-Italic.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Main-Italic.woff2') format('woff2'), url('fonts/KaTeX_Main-Italic.woff') format('woff'), url('fonts/KaTeX_Main-Italic.ttf') format('truetype');
+  font-weight: normal;
+  font-style: italic;
+}
+@font-face {
+  font-family: 'KaTeX_Main';
+  src: url('fonts/KaTeX_Main-Regular.eot');
+  src: url('fonts/KaTeX_Main-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Main-Regular.woff2') format('woff2'), url('fonts/KaTeX_Main-Regular.woff') format('woff'), url('fonts/KaTeX_Main-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Math';
+  src: url('fonts/KaTeX_Math-Italic.eot');
+  src: url('fonts/KaTeX_Math-Italic.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Math-Italic.woff2') format('woff2'), url('fonts/KaTeX_Math-Italic.woff') format('woff'), url('fonts/KaTeX_Math-Italic.ttf') format('truetype');
+  font-weight: normal;
+  font-style: italic;
+}
+@font-face {
+  font-family: 'KaTeX_SansSerif';
+  src: url('fonts/KaTeX_SansSerif-Regular.eot');
+  src: url('fonts/KaTeX_SansSerif-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_SansSerif-Regular.woff2') format('woff2'), url('fonts/KaTeX_SansSerif-Regular.woff') format('woff'), url('fonts/KaTeX_SansSerif-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Script';
+  src: url('fonts/KaTeX_Script-Regular.eot');
+  src: url('fonts/KaTeX_Script-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Script-Regular.woff2') format('woff2'), url('fonts/KaTeX_Script-Regular.woff') format('woff'), url('fonts/KaTeX_Script-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Size1';
+  src: url('fonts/KaTeX_Size1-Regular.eot');
+  src: url('fonts/KaTeX_Size1-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Size1-Regular.woff2') format('woff2'), url('fonts/KaTeX_Size1-Regular.woff') format('woff'), url('fonts/KaTeX_Size1-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Size2';
+  src: url('fonts/KaTeX_Size2-Regular.eot');
+  src: url('fonts/KaTeX_Size2-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Size2-Regular.woff2') format('woff2'), url('fonts/KaTeX_Size2-Regular.woff') format('woff'), url('fonts/KaTeX_Size2-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Size3';
+  src: url('fonts/KaTeX_Size3-Regular.eot');
+  src: url('fonts/KaTeX_Size3-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Size3-Regular.woff2') format('woff2'), url('fonts/KaTeX_Size3-Regular.woff') format('woff'), url('fonts/KaTeX_Size3-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Size4';
+  src: url('fonts/KaTeX_Size4-Regular.eot');
+  src: url('fonts/KaTeX_Size4-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Size4-Regular.woff2') format('woff2'), url('fonts/KaTeX_Size4-Regular.woff') format('woff'), url('fonts/KaTeX_Size4-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Typewriter';
+  src: url('fonts/KaTeX_Typewriter-Regular.eot');
+  src: url('fonts/KaTeX_Typewriter-Regular.eot#iefix') format('embedded-opentype'), url('fonts/KaTeX_Typewriter-Regular.woff2') format('woff2'), url('fonts/KaTeX_Typewriter-Regular.woff') format('woff'), url('fonts/KaTeX_Typewriter-Regular.ttf') format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+.katex-display {
+  display: block;
+  margin: 1em 0;
+  text-align: center;
+}
+.katex-display > .katex {
+  display: inline-block;
+  text-align: initial;
+}
+.katex {
+  font: normal 1.21em KaTeX_Main, Times New Roman, serif;
+  line-height: 1.2;
+  white-space: nowrap;
+  text-indent: 0;
+}
+.katex .katex-html {
+  display: inline-block;
+}
+.katex .katex-mathml {
+  position: absolute;
+  clip: rect(1px, 1px, 1px, 1px);
+  padding: 0;
+  border: 0;
+  height: 1px;
+  width: 1px;
+  overflow: hidden;
+}
+.katex .base {
+  display: inline-block;
+}
+.katex .strut {
+  display: inline-block;
+}
+.katex .mathrm {
+  font-style: normal;
+}
+.katex .textit {
+  font-style: italic;
+}
+.katex .mathit {
+  font-family: KaTeX_Math;
+  font-style: italic;
+}
+.katex .mathbf {
+  font-family: KaTeX_Main;
+  font-weight: bold;
+}
+.katex .amsrm {
+  font-family: KaTeX_AMS;
+}
+.katex .mathbb {
+  font-family: KaTeX_AMS;
+}
+.katex .mathcal {
+  font-family: KaTeX_Caligraphic;
+}
+.katex .mathfrak {
+  font-family: KaTeX_Fraktur;
+}
+.katex .mathtt {
+  font-family: KaTeX_Typewriter;
+}
+.katex .mathscr {
+  font-family: KaTeX_Script;
+}
+.katex .mathsf {
+  font-family: KaTeX_SansSerif;
+}
+.katex .mainit {
+  font-family: KaTeX_Main;
+  font-style: italic;
+}
+.katex .mord + .mop {
+  margin-left: 0.16667em;
+}
+.katex .mord + .mbin {
+  margin-left: 0.22222em;
+}
+.katex .mord + .mrel {
+  margin-left: 0.27778em;
+}
+.katex .mord + .minner {
+  margin-left: 0.16667em;
+}
+.katex .mop + .mord {
+  margin-left: 0.16667em;
+}
+.katex .mop + .mop {
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+}
+.katex .sizing.reset-size10.size2,
+.katex .fontsize-ensurer.reset-size10.size2 {
+  font-size: 0.2811245em;
+}
+.katex .sizing.reset-size10.size3,
+.katex .fontsize-ensurer.reset-size10.size3 {
+  font-size: 0.32128514em;
+}
+.katex .sizing.reset-size10.size4,
+.katex .fontsize-ensurer.reset-size10.size4 {
+  font-size: 0.36144578em;
+}
+.katex .sizing.reset-size10.size5,
+.katex .fontsize-ensurer.reset-size10.size5 {
+  font-size: 0.40160643em;
+}
+.katex .sizing.reset-size10.size6,
+.katex .fontsize-ensurer.reset-size10.size6 {
+  font-size: 0.48192771em;
+}
+.katex .sizing.reset-size10.size7,
+.katex .fontsize-ensurer.reset-size10.size7 {
+  font-size: 0.57831325em;
+}
+.katex .sizing.reset-size10.size8,
+.katex .fontsize-ensurer.reset-size10.size8 {
+  font-size: 0.69477912em;
+}
+.katex .sizing.reset-size10.size9,
+.katex .fontsize-ensurer.reset-size10.size9 {
+  font-size: 0.8313253em;
+}
+.katex .sizing.reset-size10.size10,
+.katex .fontsize-ensurer.reset-size10.size10 {
+  font-size: 1em;
+}
+.katex .delimsizing.size1 {
+  font-family: KaTeX_Size1;
+}
+.katex .delimsizing.size2 {
+  font-family: KaTeX_Size2;
+}
+.katex .delimsizing.size3 {
+  font-family: KaTeX_Size3;
+}
+.katex .delimsizing.size4 {
+  font-family: KaTeX_Size4;
+}
+.katex .delimsizing.mult .delim-size1 > span {
+  font-family: KaTeX_Size1;
+}
+.katex .delimsizing.mult .delim-size4 > span {
+  font-family: KaTeX_Size4;
+}
+.katex .nulldelimiter {
+  display: inline-block;
+  width: 0.12em;
+}
+.katex .op-symbol {
+  position: relative;
+}
+.katex .op-symbol.small-op {
+  font-family: KaTeX_Size1;
+}
+.katex .op-symbol.large-op {
+  font-family: KaTeX_Size2;
+}
+.katex .op-limits > .vlist > span {
+  text-align: center;
+}
+.katex .accent > .vlist > span {
+  text-align: center;
+}
+.katex .accent .accent-body > span {
+  width: 0;
+}
+.katex .accent .accent-body.accent-vec > span {
+  position: relative;
+  left: 0.326em;
+}
+.katex .mtable .vertical-separator {
+  display: inline-block;
+  margin: 0 -0.025em;
+  border-right: 0.05em solid black;
+}
+.katex .mtable .arraycolsep {
+  display: inline-block;
+}
+.katex .mtable .col-align-c > .vlist {
+  text-align: center;
+}
+.katex .mtable .col-align-l > .vlist {
+  text-align: left;
+}
+.katex .mtable .col-align-r > .vlist {
+  text-align: right;
+}

node_modules/katex/katex.js

@@ -0,0 +1,74 @@
+/* eslint no-console:0 */
+/**
+ * This is the main entry point for KaTeX. Here, we expose functions for
+ * rendering expressions either to DOM nodes or to markup strings.
+ *
+ * We also expose the ParseError class to check if errors thrown from KaTeX are
+ * errors in the expression, or errors in javascript handling.
+ */
+
+var ParseError = require("./src/ParseError");
+var Settings = require("./src/Settings");
+
+var buildTree = require("./src/buildTree");
+var parseTree = require("./src/parseTree");
+var utils = require("./src/utils");
+
+/**
+ * Parse and build an expression, and place that expression in the DOM node
+ * given.
+ */
+var render = function(expression, baseNode, options) {
+    utils.clearNode(baseNode);
+
+    var settings = new Settings(options);
+
+    var tree = parseTree(expression, settings);
+    var node = buildTree(tree, expression, settings).toNode();
+
+    baseNode.appendChild(node);
+};
+
+// KaTeX's styles don't work properly in quirks mode. Print out an error, and
+// disable rendering.
+if (typeof document !== "undefined") {
+    if (document.compatMode !== "CSS1Compat") {
+        typeof console !== "undefined" && console.warn(
+            "Warning: KaTeX doesn't work in quirks mode. Make sure your " +
+                "website has a suitable doctype.");
+
+        render = function() {
+            throw new ParseError("KaTeX doesn't work in quirks mode.");
+        };
+    }
+}
+
+/**
+ * Parse and build an expression, and return the markup for that.
+ */
+var renderToString = function(expression, options) {
+    var settings = new Settings(options);
+
+    var tree = parseTree(expression, settings);
+    return buildTree(tree, expression, settings).toMarkup();
+};
+
+/**
+ * Parse an expression and return the parse tree.
+ */
+var generateParseTree = function(expression, options) {
+    var settings = new Settings(options);
+    return parseTree(expression, settings);
+};
+
+module.exports = {
+    render: render,
+    renderToString: renderToString,
+    /**
+     * NOTE: This method is not currently recommended for public use.
+     * The internal tree representation is unstable and is very likely
+     * to change. Use at your own risk.
+     */
+    __parse: generateParseTree,
+    ParseError: ParseError
+};

node_modules/katex/package.json

@@ -0,0 +1,124 @@
+{
+  "_args": [
+    [
+      {
+        "name": "katex",
+        "raw": "katex@0.7.1",
+        "rawSpec": "0.7.1",
+        "scope": null,
+        "spec": "0.7.1",
+        "type": "version"
+      },
+      "/Volumes/Atelier/lucil/Documents/_WEB/StreamMusicalPerformance/node_modules/gitbook-plugin-katex"
+    ]
+  ],
+  "_from": "katex@0.7.1",
+  "_id": "katex@0.7.1",
+  "_inCache": true,
+  "_installable": true,
+  "_location": "/katex",
+  "_nodeVersion": "7.3.0",
+  "_npmOperationalInternal": {
+    "host": "packages-18-east.internal.npmjs.com",
+    "tmp": "tmp/katex-0.7.1.tgz_1485040762768_0.427634091116488"
+  },
+  "_npmUser": {
+    "email": "Martin.vGagern@gmx.net",
+    "name": "gagern"
+  },
+  "_npmVersion": "3.10.10",
+  "_phantomChildren": {},
+  "_requested": {
+    "name": "katex",
+    "raw": "katex@0.7.1",
+    "rawSpec": "0.7.1",
+    "scope": null,
+    "spec": "0.7.1",
+    "type": "version"
+  },
+  "_requiredBy": [
+    "/gitbook-plugin-katex"
+  ],
+  "_resolved": "https://registry.npmjs.org/katex/-/katex-0.7.1.tgz",
+  "_shasum": "06bb5298efad05e1e7228035ba8e1591f3061b8f",
+  "_shrinkwrap": null,
+  "_spec": "katex@0.7.1",
+  "_where": "/Volumes/Atelier/lucil/Documents/_WEB/StreamMusicalPerformance/node_modules/gitbook-plugin-katex",
+  "bin": {
+    "katex": "cli.js"
+  },
+  "bugs": {
+    "url": "https://github.com/Khan/KaTeX/issues"
+  },
+  "dependencies": {
+    "match-at": "^0.1.0"
+  },
+  "description": "Fast math typesetting for the web.",
+  "devDependencies": {
+    "browserify": "^10.2.4",
+    "clean-css": "~2.2.15",
+    "eslint": "^1.10.3",
+    "express": "~3.3.3",
+    "glob": "^5.0.15",
+    "jasmine": "^2.3.2",
+    "jasmine-core": "^2.3.4",
+    "js-yaml": "^3.3.1",
+    "jspngopt": "^0.1.0",
+    "less": "~2.7.1",
+    "nomnom": "^1.8.1",
+    "pako": "0.2.7",
+    "selenium-webdriver": "^2.46.1",
+    "sri-toolbox": "^0.2.0",
+    "uglify-js": "~2.4.15"
+  },
+  "directories": {},
+  "dist": {
+    "shasum": "06bb5298efad05e1e7228035ba8e1591f3061b8f",
+    "tarball": "https://registry.npmjs.org/katex/-/katex-0.7.1.tgz"
+  },
+  "files": [
+    "katex.js",
+    "cli.js",
+    "src/",
+    "dist/"
+  ],
+  "gitHead": "216832464034c13ec812a10f2143464b21a978c1",
+  "homepage": "https://github.com/Khan/KaTeX#readme",
+  "license": "MIT",
+  "main": "katex.js",
+  "maintainers": [
+    {
+      "email": "Martin.vGagern@gmx.net",
+      "name": "gagern"
+    },
+    {
+      "email": "kevinb7@gmail.com",
+      "name": "kevinbarabash"
+    },
+    {
+      "email": "opensource+npm@khanacademy.org",
+      "name": "khanacademy"
+    },
+    {
+      "email": "ben@benalpert.com",
+      "name": "spicyj"
+    },
+    {
+      "email": "xymostech@gmail.com",
+      "name": "xymostech"
+    }
+  ],
+  "name": "katex",
+  "optionalDependencies": {},
+  "readme": "ERROR: No README data found!",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/Khan/KaTeX.git"
+  },
+  "scripts": {
+    "prepublish": "make NIS= dist",
+    "start": "node server.js",
+    "test": "make lint test"
+  },
+  "version": "0.7.1"
+}

node_modules/katex/src/Lexer.js

@@ -0,0 +1,109 @@
+/**
+ * The Lexer class handles tokenizing the input in various ways. Since our
+ * parser expects us to be able to backtrack, the lexer allows lexing from any
+ * given starting point.
+ *
+ * Its main exposed function is the `lex` function, which takes a position to
+ * lex from and a type of token to lex. It defers to the appropriate `_innerLex`
+ * function.
+ *
+ * The various `_innerLex` functions perform the actual lexing of different
+ * kinds.
+ */
+
+var matchAt = require("match-at");
+
+var ParseError = require("./ParseError");
+
+// The main lexer class
+function Lexer(input) {
+    this.input = input;
+    this.pos = 0;
+}
+
+/**
+ * The resulting token returned from `lex`.
+ *
+ * It consists of the token text plus some position information.
+ * The position information is essentially a range in an input string,
+ * but instead of referencing the bare input string, we refer to the lexer.
+ * That way it is possible to attach extra metadata to the input string,
+ * like for example a file name or similar.
+ *
+ * The position information (all three parameters) is optional,
+ * so it is OK to construct synthetic tokens if appropriate.
+ * Not providing available position information may lead to
+ * degraded error reporting, though.
+ *
+ * @param {string}  text   the text of this token
+ * @param {number=} start  the start offset, zero-based inclusive
+ * @param {number=} end    the end offset, zero-based exclusive
+ * @param {Lexer=}  lexer  the lexer which in turn holds the input string
+ */
+function Token(text, start, end, lexer) {
+    this.text = text;
+    this.start = start;
+    this.end = end;
+    this.lexer = lexer;
+}
+
+/**
+ * Given a pair of tokens (this and endToken), compute a “Token” encompassing
+ * the whole input range enclosed by these two.
+ *
+ * @param {Token}  endToken  last token of the range, inclusive
+ * @param {string} text      the text of the newly constructed token
+ */
+Token.prototype.range = function(endToken, text) {
+    if (endToken.lexer !== this.lexer) {
+        return new Token(text); // sorry, no position information available
+    }
+    return new Token(text, this.start, endToken.end, this.lexer);
+};
+
+/* The following tokenRegex
+ * - matches typical whitespace (but not NBSP etc.) using its first group
+ * - does not match any control character \x00-\x1f except whitespace
+ * - does not match a bare backslash
+ * - matches any ASCII character except those just mentioned
+ * - does not match the BMP private use area \uE000-\uF8FF
+ * - does not match bare surrogate code units
+ * - matches any BMP character except for those just described
+ * - matches any valid Unicode surrogate pair
+ * - matches a backslash followed by one or more letters
+ * - matches a backslash followed by any BMP character, including newline
+ * Just because the Lexer matches something doesn't mean it's valid input:
+ * If there is no matching function or symbol definition, the Parser will
+ * still reject the input.
+ */
+var tokenRegex = new RegExp(
+    "([ \r\n\t]+)|" +                                 // whitespace
+    "([!-\\[\\]-\u2027\u202A-\uD7FF\uF900-\uFFFF]" +  // single codepoint
+    "|[\uD800-\uDBFF][\uDC00-\uDFFF]" +               // surrogate pair
+    "|\\\\(?:[a-zA-Z]+|[^\uD800-\uDFFF])" +           // function name
+    ")"
+);
+
+/**
+ * This function lexes a single token.
+ */
+Lexer.prototype.lex = function() {
+    var input = this.input;
+    var pos = this.pos;
+    if (pos === input.length) {
+        return new Token("EOF", pos, pos, this);
+    }
+    var match = matchAt(tokenRegex, input, pos);
+    if (match === null) {
+        throw new ParseError(
+            "Unexpected character: '" + input[pos] + "'",
+            new Token(input[pos], pos, pos + 1, this));
+    }
+    var text = match[2] || " ";
+    var start = this.pos;
+    this.pos += match[0].length;
+    var end = this.pos;
+    return new Token(text, start, end, this);
+};
+
+module.exports = Lexer;

node_modules/katex/src/MacroExpander.js

@@ -0,0 +1,70 @@
+/**
+ * This file contains the “gullet” where macros are expanded
+ * until only non-macro tokens remain.
+ */
+
+var Lexer = require("./Lexer");
+
+function MacroExpander(input, macros) {
+    this.lexer = new Lexer(input);
+    this.macros = macros;
+    this.stack = []; // contains tokens in REVERSE order
+    this.discardedWhiteSpace = [];
+}
+
+/**
+ * Recursively expand first token, then return first non-expandable token.
+ */
+MacroExpander.prototype.nextToken = function() {
+    for (;;) {
+        if (this.stack.length === 0) {
+            this.stack.push(this.lexer.lex());
+        }
+        var topToken = this.stack.pop();
+        var name = topToken.text;
+        if (!(name.charAt(0) === "\\" && this.macros.hasOwnProperty(name))) {
+            return topToken;
+        }
+        var expansion = this.macros[name];
+        if (typeof expansion === "string") {
+            var bodyLexer = new Lexer(expansion);
+            expansion = [];
+            var tok = bodyLexer.lex();
+            while (tok.text !== "EOF") {
+                expansion.push(tok);
+                tok = bodyLexer.lex();
+            }
+            expansion.reverse(); // to fit in with stack using push and pop
+            this.macros[name] = expansion;
+        }
+        this.stack = this.stack.concat(expansion);
+    }
+};
+
+MacroExpander.prototype.get = function(ignoreSpace) {
+    this.discardedWhiteSpace = [];
+    var token = this.nextToken();
+    if (ignoreSpace) {
+        while (token.text === " ") {
+            this.discardedWhiteSpace.push(token);
+            token = this.nextToken();
+        }
+    }
+    return token;
+};
+
+/**
+ * Undo the effect of the preceding call to the get method.
+ * A call to this method MUST be immediately preceded and immediately followed
+ * by a call to get.  Only used during mode switching, i.e. after one token
+ * was got in the old mode but should get got again in a new mode
+ * with possibly different whitespace handling.
+ */
+MacroExpander.prototype.unget = function(token) {
+    this.stack.push(token);
+    while (this.discardedWhiteSpace.length !== 0) {
+        this.stack.push(this.discardedWhiteSpace.pop());
+    }
+};
+
+module.exports = MacroExpander;

node_modules/katex/src/Options.js

@@ -0,0 +1,189 @@
+/**
+ * This file contains information about the options that the Parser carries
+ * around with it while parsing. Data is held in an `Options` object, and when
+ * recursing, a new `Options` object can be created with the `.with*` and
+ * `.reset` functions.
+ */
+
+/**
+ * This is the main options class. It contains the style, size, color, and font
+ * of the current parse level. It also contains the style and size of the parent
+ * parse level, so size changes can be handled efficiently.
+ *
+ * Each of the `.with*` and `.reset` functions passes its current style and size
+ * as the parentStyle and parentSize of the new options class, so parent
+ * handling is taken care of automatically.
+ */
+function Options(data) {
+    this.style = data.style;
+    this.color = data.color;
+    this.size = data.size;
+    this.phantom = data.phantom;
+    this.font = data.font;
+
+    if (data.parentStyle === undefined) {
+        this.parentStyle = data.style;
+    } else {
+        this.parentStyle = data.parentStyle;
+    }
+
+    if (data.parentSize === undefined) {
+        this.parentSize = data.size;
+    } else {
+        this.parentSize = data.parentSize;
+    }
+}
+
+/**
+ * Returns a new options object with the same properties as "this".  Properties
+ * from "extension" will be copied to the new options object.
+ */
+Options.prototype.extend = function(extension) {
+    var data = {
+        style: this.style,
+        size: this.size,
+        color: this.color,
+        parentStyle: this.style,
+        parentSize: this.size,
+        phantom: this.phantom,
+        font: this.font
+    };
+
+    for (var key in extension) {
+        if (extension.hasOwnProperty(key)) {
+            data[key] = extension[key];
+        }
+    }
+
+    return new Options(data);
+};
+
+/**
+ * Create a new options object with the given style.
+ */
+Options.prototype.withStyle = function(style) {
+    return this.extend({
+        style: style
+    });
+};
+
+/**
+ * Create a new options object with the given size.
+ */
+Options.prototype.withSize = function(size) {
+    return this.extend({
+        size: size
+    });
+};
+
+/**
+ * Create a new options object with the given color.
+ */
+Options.prototype.withColor = function(color) {
+    return this.extend({
+        color: color
+    });
+};
+
+/**
+ * Create a new options object with "phantom" set to true.
+ */
+Options.prototype.withPhantom = function() {
+    return this.extend({
+        phantom: true
+    });
+};
+
+/**
+ * Create a new options objects with the give font.
+ */
+Options.prototype.withFont = function(font) {
+    return this.extend({
+        font: font || this.font
+    });
+};
+
+/**
+ * Create a new options object with the same style, size, and color. This is
+ * used so that parent style and size changes are handled correctly.
+ */
+Options.prototype.reset = function() {
+    return this.extend({});
+};
+
+/**
+ * A map of color names to CSS colors.
+ * TODO(emily): Remove this when we have real macros
+ */
+var colorMap = {
+    "katex-blue": "#6495ed",
+    "katex-orange": "#ffa500",
+    "katex-pink": "#ff00af",
+    "katex-red": "#df0030",
+    "katex-green": "#28ae7b",
+    "katex-gray": "gray",
+    "katex-purple": "#9d38bd",
+    "katex-blueA": "#ccfaff",
+    "katex-blueB": "#80f6ff",
+    "katex-blueC": "#63d9ea",
+    "katex-blueD": "#11accd",
+    "katex-blueE": "#0c7f99",
+    "katex-tealA": "#94fff5",
+    "katex-tealB": "#26edd5",
+    "katex-tealC": "#01d1c1",
+    "katex-tealD": "#01a995",
+    "katex-tealE": "#208170",
+    "katex-greenA": "#b6ffb0",
+    "katex-greenB": "#8af281",
+    "katex-greenC": "#74cf70",
+    "katex-greenD": "#1fab54",
+    "katex-greenE": "#0d923f",
+    "katex-goldA": "#ffd0a9",
+    "katex-goldB": "#ffbb71",
+    "katex-goldC": "#ff9c39",
+    "katex-goldD": "#e07d10",
+    "katex-goldE": "#a75a05",
+    "katex-redA": "#fca9a9",
+    "katex-redB": "#ff8482",
+    "katex-redC": "#f9685d",
+    "katex-redD": "#e84d39",
+    "katex-redE": "#bc2612",
+    "katex-maroonA": "#ffbde0",
+    "katex-maroonB": "#ff92c6",
+    "katex-maroonC": "#ed5fa6",
+    "katex-maroonD": "#ca337c",
+    "katex-maroonE": "#9e034e",
+    "katex-purpleA": "#ddd7ff",
+    "katex-purpleB": "#c6b9fc",
+    "katex-purpleC": "#aa87ff",
+    "katex-purpleD": "#7854ab",
+    "katex-purpleE": "#543b78",
+    "katex-mintA": "#f5f9e8",
+    "katex-mintB": "#edf2df",
+    "katex-mintC": "#e0e5cc",
+    "katex-grayA": "#f6f7f7",
+    "katex-grayB": "#f0f1f2",
+    "katex-grayC": "#e3e5e6",
+    "katex-grayD": "#d6d8da",
+    "katex-grayE": "#babec2",
+    "katex-grayF": "#888d93",
+    "katex-grayG": "#626569",
+    "katex-grayH": "#3b3e40",
+    "katex-grayI": "#21242c",
+    "katex-kaBlue": "#314453",
+    "katex-kaGreen": "#71B307"
+};
+
+/**
+ * Gets the CSS color of the current options object, accounting for the
+ * `colorMap`.
+ */
+Options.prototype.getColor = function() {
+    if (this.phantom) {
+        return "transparent";
+    } else {
+        return colorMap[this.color] || this.color;
+    }
+};
+
+module.exports = Options;

node_modules/katex/src/ParseError.js

@@ -0,0 +1,64 @@
+/**
+ * This is the ParseError class, which is the main error thrown by KaTeX
+ * functions when something has gone wrong. This is used to distinguish internal
+ * errors from errors in the expression that the user provided.
+ *
+ * If possible, a caller should provide a Token or ParseNode with information
+ * about where in the source string the problem occurred.
+ *
+ * @param {string} message  The error message
+ * @param {(Token|ParseNode)=} token  An object providing position information
+ */
+function ParseError(message, token) {
+    var error = "KaTeX parse error: " + message;
+    var start;
+    var end;
+
+    if (token && token.lexer && token.start <= token.end) {
+        // If we have the input and a position, make the error a bit fancier
+
+        // Get the input
+        var input = token.lexer.input;
+
+        // Prepend some information
+        start = token.start;
+        end = token.end;
+        if (start === input.length) {
+            error += " at end of input: ";
+        } else {
+            error += " at position " + (start + 1) + ": ";
+        }
+
+        // Underline token in question using combining underscores
+        var underlined = input.slice(start, end).replace(/[^]/g, "$&\u0332");
+
+        // Extract some context from the input and add it to the error
+        var left;
+        if (start > 15) {
+            left = "…" + input.slice(start - 15, start);
+        } else {
+            left = input.slice(0, start);
+        }
+        var right;
+        if (end + 15 < input.length) {
+            right = input.slice(end, end + 15) + "…";
+        } else {
+            right = input.slice(end);
+        }
+        error += left + underlined + right;
+    }
+
+    // Some hackery to make ParseError a prototype of Error
+    // See http://stackoverflow.com/a/8460753
+    var self = new Error(error);
+    self.name = "ParseError";
+    self.__proto__ = ParseError.prototype;
+
+    self.position = start;
+    return self;
+}
+
+// More hackery
+ParseError.prototype.__proto__ = Error.prototype;
+
+module.exports = ParseError;

node_modules/katex/src/Parser.js

@@ -0,0 +1,849 @@
+/* eslint no-constant-condition:0 */
+var functions = require("./functions");
+var environments = require("./environments");
+var MacroExpander = require("./MacroExpander");
+var symbols = require("./symbols");
+var utils = require("./utils");
+var cjkRegex = require("./unicodeRegexes").cjkRegex;
+
+var parseData = require("./parseData");
+var ParseError = require("./ParseError");
+
+/**
+ * This file contains the parser used to parse out a TeX expression from the
+ * input. Since TeX isn't context-free, standard parsers don't work particularly
+ * well.
+ *
+ * The strategy of this parser is as such:
+ *
+ * The main functions (the `.parse...` ones) take a position in the current
+ * parse string to parse tokens from. The lexer (found in Lexer.js, stored at
+ * this.lexer) also supports pulling out tokens at arbitrary places. When
+ * individual tokens are needed at a position, the lexer is called to pull out a
+ * token, which is then used.
+ *
+ * The parser has a property called "mode" indicating the mode that
+ * the parser is currently in. Currently it has to be one of "math" or
+ * "text", which denotes whether the current environment is a math-y
+ * one or a text-y one (e.g. inside \text). Currently, this serves to
+ * limit the functions which can be used in text mode.
+ *
+ * The main functions then return an object which contains the useful data that
+ * was parsed at its given point, and a new position at the end of the parsed
+ * data. The main functions can call each other and continue the parsing by
+ * using the returned position as a new starting point.
+ *
+ * There are also extra `.handle...` functions, which pull out some reused
+ * functionality into self-contained functions.
+ *
+ * The earlier functions return ParseNodes.
+ * The later functions (which are called deeper in the parse) sometimes return
+ * ParseFuncOrArgument, which contain a ParseNode as well as some data about
+ * whether the parsed object is a function which is missing some arguments, or a
+ * standalone object which can be used as an argument to another function.
+ */
+
+/**
+ * Main Parser class
+ */
+function Parser(input, settings) {
+    // Create a new macro expander (gullet) and (indirectly via that) also a
+    // new lexer (mouth) for this parser (stomach, in the language of TeX)
+    this.gullet = new MacroExpander(input, settings.macros);
+    // Store the settings for use in parsing
+    this.settings = settings;
+    // Count leftright depth (for \middle errors)
+    this.leftrightDepth = 0;
+}
+
+var ParseNode = parseData.ParseNode;
+
+/**
+ * An initial function (without its arguments), or an argument to a function.
+ * The `result` argument should be a ParseNode.
+ */
+function ParseFuncOrArgument(result, isFunction, token) {
+    this.result = result;
+    // Is this a function (i.e. is it something defined in functions.js)?
+    this.isFunction = isFunction;
+    this.token = token;
+}
+
+/**
+ * Checks a result to make sure it has the right type, and throws an
+ * appropriate error otherwise.
+ *
+ * @param {boolean=} consume whether to consume the expected token,
+ *                           defaults to true
+ */
+Parser.prototype.expect = function(text, consume) {
+    if (this.nextToken.text !== text) {
+        throw new ParseError(
+            "Expected '" + text + "', got '" + this.nextToken.text + "'",
+            this.nextToken
+        );
+    }
+    if (consume !== false) {
+        this.consume();
+    }
+};
+
+/**
+ * Considers the current look ahead token as consumed,
+ * and fetches the one after that as the new look ahead.
+ */
+Parser.prototype.consume = function() {
+    this.nextToken = this.gullet.get(this.mode === "math");
+};
+
+Parser.prototype.switchMode = function(newMode) {
+    this.gullet.unget(this.nextToken);
+    this.mode = newMode;
+    this.consume();
+};
+
+/**
+ * Main parsing function, which parses an entire input.
+ *
+ * @return {?Array.<ParseNode>}
+ */
+Parser.prototype.parse = function() {
+    // Try to parse the input
+    this.mode = "math";
+    this.consume();
+    var parse = this.parseInput();
+    return parse;
+};
+
+/**
+ * Parses an entire input tree.
+ */
+Parser.prototype.parseInput = function() {
+    // Parse an expression
+    var expression = this.parseExpression(false);
+    // If we succeeded, make sure there's an EOF at the end
+    this.expect("EOF", false);
+    return expression;
+};
+
+var endOfExpression = ["}", "\\end", "\\right", "&", "\\\\", "\\cr"];
+
+/**
+ * Parses an "expression", which is a list of atoms.
+ *
+ * @param {boolean} breakOnInfix  Should the parsing stop when we hit infix
+ *                  nodes? This happens when functions have higher precendence
+ *                  than infix nodes in implicit parses.
+ *
+ * @param {?string} breakOnTokenText  The text of the token that the expression
+ *                  should end with, or `null` if something else should end the
+ *                  expression.
+ *
+ * @return {ParseNode}
+ */
+Parser.prototype.parseExpression = function(breakOnInfix, breakOnTokenText) {
+    var body = [];
+    // Keep adding atoms to the body until we can't parse any more atoms (either
+    // we reached the end, a }, or a \right)
+    while (true) {
+        var lex = this.nextToken;
+        if (endOfExpression.indexOf(lex.text) !== -1) {
+            break;
+        }
+        if (breakOnTokenText && lex.text === breakOnTokenText) {
+            break;
+        }
+        if (breakOnInfix && functions[lex.text] && functions[lex.text].infix) {
+            break;
+        }
+        var atom = this.parseAtom();
+        if (!atom) {
+            if (!this.settings.throwOnError && lex.text[0] === "\\") {
+                var errorNode = this.handleUnsupportedCmd();
+                body.push(errorNode);
+                continue;
+            }
+
+            break;
+        }
+        body.push(atom);
+    }
+    return this.handleInfixNodes(body);
+};
+
+/**
+ * Rewrites infix operators such as \over with corresponding commands such
+ * as \frac.
+ *
+ * There can only be one infix operator per group.  If there's more than one
+ * then the expression is ambiguous.  This can be resolved by adding {}.
+ *
+ * @returns {Array}
+ */
+Parser.prototype.handleInfixNodes = function(body) {
+    var overIndex = -1;
+    var funcName;
+
+    for (var i = 0; i < body.length; i++) {
+        var node = body[i];
+        if (node.type === "infix") {
+            if (overIndex !== -1) {
+                throw new ParseError(
+                    "only one infix operator per group",
+                    node.value.token);
+            }
+            overIndex = i;
+            funcName = node.value.replaceWith;
+        }
+    }
+
+    if (overIndex !== -1) {
+        var numerNode;
+        var denomNode;
+
+        var numerBody = body.slice(0, overIndex);
+        var denomBody = body.slice(overIndex + 1);
+
+        if (numerBody.length === 1 && numerBody[0].type === "ordgroup") {
+            numerNode = numerBody[0];
+        } else {
+            numerNode = new ParseNode("ordgroup", numerBody, this.mode);
+        }
+
+        if (denomBody.length === 1 && denomBody[0].type === "ordgroup") {
+            denomNode = denomBody[0];
+        } else {
+            denomNode = new ParseNode("ordgroup", denomBody, this.mode);
+        }
+
+        var value = this.callFunction(
+            funcName, [numerNode, denomNode], null);
+        return [new ParseNode(value.type, value, this.mode)];
+    } else {
+        return body;
+    }
+};
+
+// The greediness of a superscript or subscript
+var SUPSUB_GREEDINESS = 1;
+
+/**
+ * Handle a subscript or superscript with nice errors.
+ */
+Parser.prototype.handleSupSubscript = function(name) {
+    var symbolToken = this.nextToken;
+    var symbol = symbolToken.text;
+    this.consume();
+    var group = this.parseGroup();
+
+    if (!group) {
+        if (!this.settings.throwOnError && this.nextToken.text[0] === "\\") {
+            return this.handleUnsupportedCmd();
+        } else {
+            throw new ParseError(
+                "Expected group after '" + symbol + "'",
+                symbolToken
+            );
+        }
+    } else if (group.isFunction) {
+        // ^ and _ have a greediness, so handle interactions with functions'
+        // greediness
+        var funcGreediness = functions[group.result].greediness;
+        if (funcGreediness > SUPSUB_GREEDINESS) {
+            return this.parseFunction(group);
+        } else {
+            throw new ParseError(
+                "Got function '" + group.result + "' with no arguments " +
+                    "as " + name, symbolToken);
+        }
+    } else {
+        return group.result;
+    }
+};
+
+/**
+ * Converts the textual input of an unsupported command into a text node
+ * contained within a color node whose color is determined by errorColor
+ */
+Parser.prototype.handleUnsupportedCmd = function() {
+    var text = this.nextToken.text;
+    var textordArray = [];
+
+    for (var i = 0; i < text.length; i++) {
+        textordArray.push(new ParseNode("textord", text[i], "text"));
+    }
+
+    var textNode = new ParseNode(
+        "text",
+        {
+            body: textordArray,
+            type: "text"
+        },
+        this.mode);
+
+    var colorNode = new ParseNode(
+        "color",
+        {
+            color: this.settings.errorColor,
+            value: [textNode],
+            type: "color"
+        },
+        this.mode);
+
+    this.consume();
+    return colorNode;
+};
+
+/**
+ * Parses a group with optional super/subscripts.
+ *
+ * @return {?ParseNode}
+ */
+Parser.prototype.parseAtom = function() {
+    // The body of an atom is an implicit group, so that things like
+    // \left(x\right)^2 work correctly.
+    var base = this.parseImplicitGroup();
+
+    // In text mode, we don't have superscripts or subscripts
+    if (this.mode === "text") {
+        return base;
+    }
+
+    // Note that base may be empty (i.e. null) at this point.
+
+    var superscript;
+    var subscript;
+    while (true) {
+        // Lex the first token
+        var lex = this.nextToken;
+
+        if (lex.text === "\\limits" || lex.text === "\\nolimits") {
+            // We got a limit control
+            if (!base || base.type !== "op") {
+                throw new ParseError(
+                    "Limit controls must follow a math operator",
+                    lex);
+            } else {
+                var limits = lex.text === "\\limits";
+                base.value.limits = limits;
+                base.value.alwaysHandleSupSub = true;
+            }
+            this.consume();
+        } else if (lex.text === "^") {
+            // We got a superscript start
+            if (superscript) {
+                throw new ParseError("Double superscript", lex);
+            }
+            superscript = this.handleSupSubscript("superscript");
+        } else if (lex.text === "_") {
+            // We got a subscript start
+            if (subscript) {
+                throw new ParseError("Double subscript", lex);
+            }
+            subscript = this.handleSupSubscript("subscript");
+        } else if (lex.text === "'") {
+            // We got a prime
+            var prime = new ParseNode("textord", "\\prime", this.mode);
+
+            // Many primes can be grouped together, so we handle this here
+            var primes = [prime];
+            this.consume();
+            // Keep lexing tokens until we get something that's not a prime
+            while (this.nextToken.text === "'") {
+                // For each one, add another prime to the list
+                primes.push(prime);
+                this.consume();
+            }
+            // Put them into an ordgroup as the superscript
+            superscript = new ParseNode("ordgroup", primes, this.mode);
+        } else {
+            // If it wasn't ^, _, or ', stop parsing super/subscripts
+            break;
+        }
+    }
+
+    if (superscript || subscript) {
+        // If we got either a superscript or subscript, create a supsub
+        return new ParseNode("supsub", {
+            base: base,
+            sup: superscript,
+            sub: subscript
+        }, this.mode);
+    } else {
+        // Otherwise return the original body
+        return base;
+    }
+};
+
+// A list of the size-changing functions, for use in parseImplicitGroup
+var sizeFuncs = [
+    "\\tiny", "\\scriptsize", "\\footnotesize", "\\small", "\\normalsize",
+    "\\large", "\\Large", "\\LARGE", "\\huge", "\\Huge"
+];
+
+// A list of the style-changing functions, for use in parseImplicitGroup
+var styleFuncs = [
+    "\\displaystyle", "\\textstyle", "\\scriptstyle", "\\scriptscriptstyle"
+];
+
+/**
+ * Parses an implicit group, which is a group that starts at the end of a
+ * specified, and ends right before a higher explicit group ends, or at EOL. It
+ * is used for functions that appear to affect the current style, like \Large or
+ * \textrm, where instead of keeping a style we just pretend that there is an
+ * implicit grouping after it until the end of the group. E.g.
+ *   small text {\Large large text} small text again
+ * It is also used for \left and \right to get the correct grouping.
+ *
+ * @return {?ParseNode}
+ */
+Parser.prototype.parseImplicitGroup = function() {
+    var start = this.parseSymbol();
+
+    if (start == null) {
+        // If we didn't get anything we handle, fall back to parseFunction
+        return this.parseFunction();
+    }
+
+    var func = start.result;
+    var body;
+
+    if (func === "\\left") {
+        // If we see a left:
+        // Parse the entire left function (including the delimiter)
+        var left = this.parseFunction(start);
+        // Parse out the implicit body
+        ++this.leftrightDepth;
+        body = this.parseExpression(false);
+        --this.leftrightDepth;
+        // Check the next token
+        this.expect("\\right", false);
+        var right = this.parseFunction();
+        return new ParseNode("leftright", {
+            body: body,
+            left: left.value.value,
+            right: right.value.value
+        }, this.mode);
+    } else if (func === "\\begin") {
+        // begin...end is similar to left...right
+        var begin = this.parseFunction(start);
+        var envName = begin.value.name;
+        if (!environments.hasOwnProperty(envName)) {
+            throw new ParseError(
+                "No such environment: " + envName, begin.value.nameGroup);
+        }
+        // Build the environment object. Arguments and other information will
+        // be made available to the begin and end methods using properties.
+        var env = environments[envName];
+        var args = this.parseArguments("\\begin{" + envName + "}", env);
+        var context = {
+            mode: this.mode,
+            envName: envName,
+            parser: this,
+            positions: args.pop()
+        };
+        var result = env.handler(context, args);
+        this.expect("\\end", false);
+        var endNameToken = this.nextToken;
+        var end = this.parseFunction();
+        if (end.value.name !== envName) {
+            throw new ParseError(
+                "Mismatch: \\begin{" + envName + "} matched " +
+                "by \\end{" + end.value.name + "}",
+                endNameToken);
+        }
+        result.position = end.position;
+        return result;
+    } else if (utils.contains(sizeFuncs, func)) {
+        // If we see a sizing function, parse out the implict body
+        body = this.parseExpression(false);
+        return new ParseNode("sizing", {
+            // Figure out what size to use based on the list of functions above
+            size: "size" + (utils.indexOf(sizeFuncs, func) + 1),
+            value: body
+        }, this.mode);
+    } else if (utils.contains(styleFuncs, func)) {
+        // If we see a styling function, parse out the implict body
+        body = this.parseExpression(true);
+        return new ParseNode("styling", {
+            // Figure out what style to use by pulling out the style from
+            // the function name
+            style: func.slice(1, func.length - 5),
+            value: body
+        }, this.mode);
+    } else {
+        // Defer to parseFunction if it's not a function we handle
+        return this.parseFunction(start);
+    }
+};
+
+/**
+ * Parses an entire function, including its base and all of its arguments.
+ * The base might either have been parsed already, in which case
+ * it is provided as an argument, or it's the next group in the input.
+ *
+ * @param {ParseFuncOrArgument=} baseGroup optional as described above
+ * @return {?ParseNode}
+ */
+Parser.prototype.parseFunction = function(baseGroup) {
+    if (!baseGroup) {
+        baseGroup = this.parseGroup();
+    }
+
+    if (baseGroup) {
+        if (baseGroup.isFunction) {
+            var func = baseGroup.result;
+            var funcData = functions[func];
+            if (this.mode === "text" && !funcData.allowedInText) {
+                throw new ParseError(
+                    "Can't use function '" + func + "' in text mode",
+                    baseGroup.token);
+            }
+
+            var args = this.parseArguments(func, funcData);
+            var token = baseGroup.token;
+            var result = this.callFunction(func, args, args.pop(), token);
+            return new ParseNode(result.type, result, this.mode);
+        } else {
+            return baseGroup.result;
+        }
+    } else {
+        return null;
+    }
+};
+
+/**
+ * Call a function handler with a suitable context and arguments.
+ */
+Parser.prototype.callFunction = function(name, args, positions, token) {
+    var context = {
+        funcName: name,
+        parser: this,
+        positions: positions,
+        token: token
+    };
+    return functions[name].handler(context, args);
+};
+
+/**
+ * Parses the arguments of a function or environment
+ *
+ * @param {string} func  "\name" or "\begin{name}"
+ * @param {{numArgs:number,numOptionalArgs:number|undefined}} funcData
+ * @return the array of arguments, with the list of positions as last element
+ */
+Parser.prototype.parseArguments = function(func, funcData) {
+    var totalArgs = funcData.numArgs + funcData.numOptionalArgs;
+    if (totalArgs === 0) {
+        return [[this.pos]];
+    }
+
+    var baseGreediness = funcData.greediness;
+    var positions = [this.pos];
+    var args = [];
+
+    for (var i = 0; i < totalArgs; i++) {
+        var nextToken = this.nextToken;
+        var argType = funcData.argTypes && funcData.argTypes[i];
+        var arg;
+        if (i < funcData.numOptionalArgs) {
+            if (argType) {
+                arg = this.parseGroupOfType(argType, true);
+            } else {
+                arg = this.parseGroup(true);
+            }
+            if (!arg) {
+                args.push(null);
+                positions.push(this.pos);
+                continue;
+            }
+        } else {
+            if (argType) {
+                arg = this.parseGroupOfType(argType);
+            } else {
+                arg = this.parseGroup();
+            }
+            if (!arg) {
+                if (!this.settings.throwOnError &&
+                    this.nextToken.text[0] === "\\") {
+                    arg = new ParseFuncOrArgument(
+                        this.handleUnsupportedCmd(this.nextToken.text),
+                        false);
+                } else {
+                    throw new ParseError(
+                        "Expected group after '" + func + "'", nextToken);
+                }
+            }
+        }
+        var argNode;
+        if (arg.isFunction) {
+            var argGreediness =
+                functions[arg.result].greediness;
+            if (argGreediness > baseGreediness) {
+                argNode = this.parseFunction(arg);
+            } else {
+                throw new ParseError(
+                    "Got function '" + arg.result + "' as " +
+                    "argument to '" + func + "'", nextToken);
+            }
+        } else {
+            argNode = arg.result;
+        }
+        args.push(argNode);
+        positions.push(this.pos);
+    }
+
+    args.push(positions);
+
+    return args;
+};
+
+
+/**
+ * Parses a group when the mode is changing.
+ *
+ * @return {?ParseFuncOrArgument}
+ */
+Parser.prototype.parseGroupOfType = function(innerMode, optional) {
+    var outerMode = this.mode;
+    // Handle `original` argTypes
+    if (innerMode === "original") {
+        innerMode = outerMode;
+    }
+
+    if (innerMode === "color") {
+        return this.parseColorGroup(optional);
+    }
+    if (innerMode === "size") {
+        return this.parseSizeGroup(optional);
+    }
+
+    this.switchMode(innerMode);
+    if (innerMode === "text") {
+        // text mode is special because it should ignore the whitespace before
+        // it
+        while (this.nextToken.text === " ") {
+            this.consume();
+        }
+    }
+    // By the time we get here, innerMode is one of "text" or "math".
+    // We switch the mode of the parser, recurse, then restore the old mode.
+    var res = this.parseGroup(optional);
+    this.switchMode(outerMode);
+    return res;
+};
+
+/**
+ * Parses a group, essentially returning the string formed by the
+ * brace-enclosed tokens plus some position information.
+ *
+ * @param {string} modeName  Used to describe the mode in error messages
+ * @param {boolean=} optional  Whether the group is optional or required
+ */
+Parser.prototype.parseStringGroup = function(modeName, optional) {
+    if (optional && this.nextToken.text !== "[") {
+        return null;
+    }
+    var outerMode = this.mode;
+    this.mode = "text";
+    this.expect(optional ? "[" : "{");
+    var str = "";
+    var firstToken = this.nextToken;
+    var lastToken = firstToken;
+    while (this.nextToken.text !== (optional ? "]" : "}")) {
+        if (this.nextToken.text === "EOF") {
+            throw new ParseError(
+                "Unexpected end of input in " + modeName,
+                firstToken.range(this.nextToken, str));
+        }
+        lastToken = this.nextToken;
+        str += lastToken.text;
+        this.consume();
+    }
+    this.mode = outerMode;
+    this.expect(optional ? "]" : "}");
+    return firstToken.range(lastToken, str);
+};
+
+/**
+ * Parses a regex-delimited group: the largest sequence of tokens
+ * whose concatenated strings match `regex`. Returns the string
+ * formed by the tokens plus some position information.
+ *
+ * @param {RegExp} regex
+ * @param {string} modeName  Used to describe the mode in error messages
+ */
+Parser.prototype.parseRegexGroup = function(regex, modeName) {
+    var outerMode = this.mode;
+    this.mode = "text";
+    var firstToken = this.nextToken;
+    var lastToken = firstToken;
+    var str = "";
+    while (this.nextToken.text !== "EOF"
+           && regex.test(str + this.nextToken.text)) {
+        lastToken = this.nextToken;
+        str += lastToken.text;
+        this.consume();
+    }
+    if (str === "") {
+        throw new ParseError(
+            "Invalid " + modeName + ": '" + firstToken.text + "'",
+            firstToken);
+    }
+    this.mode = outerMode;
+    return firstToken.range(lastToken, str);
+};
+
+/**
+ * Parses a color description.
+ */
+Parser.prototype.parseColorGroup = function(optional) {
+    var res = this.parseStringGroup("color", optional);
+    if (!res) {
+        return null;
+    }
+    var match = (/^(#[a-z0-9]+|[a-z]+)$/i).exec(res.text);
+    if (!match) {
+        throw new ParseError("Invalid color: '" + res.text + "'", res);
+    }
+    return new ParseFuncOrArgument(
+        new ParseNode("color", match[0], this.mode),
+        false);
+};
+
+/**
+ * Parses a size specification, consisting of magnitude and unit.
+ */
+Parser.prototype.parseSizeGroup = function(optional) {
+    var res;
+    if (!optional && this.nextToken.text !== "{") {
+        res = this.parseRegexGroup(
+            /^[-+]? *(?:$|\d+|\d+\.\d*|\.\d*) *[a-z]{0,2}$/, "size");
+    } else {
+        res = this.parseStringGroup("size", optional);
+    }
+    if (!res) {
+        return null;
+    }
+    var match = (/([-+]?) *(\d+(?:\.\d*)?|\.\d+) *([a-z]{2})/).exec(res.text);
+    if (!match) {
+        throw new ParseError("Invalid size: '" + res.text + "'", res);
+    }
+    var data = {
+        number: +(match[1] + match[2]), // sign + magnitude, cast to number
+        unit: match[3]
+    };
+    if (data.unit !== "em" && data.unit !== "ex" && data.unit !== "mu") {
+        throw new ParseError("Invalid unit: '" + data.unit + "'", res);
+    }
+    return new ParseFuncOrArgument(
+        new ParseNode("color", data, this.mode),
+        false);
+};
+
+/**
+ * If the argument is false or absent, this parses an ordinary group,
+ * which is either a single nucleus (like "x") or an expression
+ * in braces (like "{x+y}").
+ * If the argument is true, it parses either a bracket-delimited expression
+ * (like "[x+y]") or returns null to indicate the absence of a
+ * bracket-enclosed group.
+ *
+ * @param {boolean=} optional  Whether the group is optional or required
+ * @return {?ParseFuncOrArgument}
+ */
+Parser.prototype.parseGroup = function(optional) {
+    var firstToken = this.nextToken;
+    // Try to parse an open brace
+    if (this.nextToken.text === (optional ? "[" : "{")) {
+        // If we get a brace, parse an expression
+        this.consume();
+        var expression = this.parseExpression(false, optional ? "]" : null);
+        var lastToken = this.nextToken;
+        // Make sure we get a close brace
+        this.expect(optional ? "]" : "}");
+        if (this.mode === "text") {
+            this.formLigatures(expression);
+        }
+        return new ParseFuncOrArgument(
+            new ParseNode("ordgroup", expression, this.mode,
+                          firstToken, lastToken),
+            false);
+    } else {
+        // Otherwise, just return a nucleus, or nothing for an optional group
+        return optional ? null : this.parseSymbol();
+    }
+};
+
+/**
+ * Form ligature-like combinations of characters for text mode.
+ * This includes inputs like "--", "---", "``" and "''".
+ * The result will simply replace multiple textord nodes with a single
+ * character in each value by a single textord node having multiple
+ * characters in its value.  The representation is still ASCII source.
+ *
+ * @param {Array.<ParseNode>} group  the nodes of this group,
+ *                                   list will be moified in place
+ */
+Parser.prototype.formLigatures = function(group) {
+    var i;
+    var n = group.length - 1;
+    for (i = 0; i < n; ++i) {
+        var a = group[i];
+        var v = a.value;
+        if (v === "-" && group[i + 1].value === "-") {
+            if (i + 1 < n && group[i + 2].value === "-") {
+                group.splice(i, 3, new ParseNode(
+                    "textord", "---", "text", a, group[i + 2]));
+                n -= 2;
+            } else {
+                group.splice(i, 2, new ParseNode(
+                    "textord", "--", "text", a, group[i + 1]));
+                n -= 1;
+            }
+        }
+        if ((v === "'" || v === "`") && group[i + 1].value === v) {
+            group.splice(i, 2, new ParseNode(
+                "textord", v + v, "text", a, group[i + 1]));
+            n -= 1;
+        }
+    }
+};
+
+/**
+ * Parse a single symbol out of the string. Here, we handle both the functions
+ * we have defined, as well as the single character symbols
+ *
+ * @return {?ParseFuncOrArgument}
+ */
+Parser.prototype.parseSymbol = function() {
+    var nucleus = this.nextToken;
+
+    if (functions[nucleus.text]) {
+        this.consume();
+        // If there exists a function with this name, we return the function and
+        // say that it is a function.
+        return new ParseFuncOrArgument(
+            nucleus.text,
+            true, nucleus);
+    } else if (symbols[this.mode][nucleus.text]) {
+        this.consume();
+        // Otherwise if this is a no-argument function, find the type it
+        // corresponds to in the symbols map
+        return new ParseFuncOrArgument(
+            new ParseNode(symbols[this.mode][nucleus.text].group,
+                          nucleus.text, this.mode, nucleus),
+            false, nucleus);
+    } else if (this.mode === "text" && cjkRegex.test(nucleus.text)) {
+        this.consume();
+        return new ParseFuncOrArgument(
+            new ParseNode("textord", nucleus.text, this.mode, nucleus),
+            false, nucleus);
+    } else {
+        return null;
+    }
+};
+
+Parser.prototype.ParseNode = ParseNode;
+
+module.exports = Parser;

node_modules/katex/src/Settings.js

@@ -0,0 +1,29 @@
+/**
+ * This is a module for storing settings passed into KaTeX. It correctly handles
+ * default settings.
+ */
+
+/**
+ * Helper function for getting a default value if the value is undefined
+ */
+function get(option, defaultValue) {
+    return option === undefined ? defaultValue : option;
+}
+
+/**
+ * The main Settings object
+ *
+ * The current options stored are:
+ *  - displayMode: Whether the expression should be typeset by default in
+ *                 textstyle or displaystyle (default false)
+ */
+function Settings(options) {
+    // allow null options
+    options = options || {};
+    this.displayMode = get(options.displayMode, false);
+    this.throwOnError = get(options.throwOnError, true);
+    this.errorColor = get(options.errorColor, "#cc0000");
+    this.macros = options.macros || {};
+}
+
+module.exports = Settings;

node_modules/katex/src/Style.js

@@ -0,0 +1,149 @@
+/**
+ * This file contains information and classes for the various kinds of styles
+ * used in TeX. It provides a generic `Style` class, which holds information
+ * about a specific style. It then provides instances of all the different kinds
+ * of styles possible, and provides functions to move between them and get
+ * information about them.
+ */
+
+var sigmas = require("./fontMetrics.js").sigmas;
+
+var metrics = [{}, {}, {}];
+var i;
+for (var key in sigmas) {
+    if (sigmas.hasOwnProperty(key)) {
+        for (i = 0; i < 3; i++) {
+            metrics[i][key] = sigmas[key][i];
+        }
+    }
+}
+for (i = 0; i < 3; i++) {
+    metrics[i].emPerEx = sigmas.xHeight[i] / sigmas.quad[i];
+}
+
+/**
+ * The main style class. Contains a unique id for the style, a size (which is
+ * the same for cramped and uncramped version of a style), a cramped flag, and a
+ * size multiplier, which gives the size difference between a style and
+ * textstyle.
+ */
+function Style(id, size, multiplier, cramped) {
+    this.id = id;
+    this.size = size;
+    this.cramped = cramped;
+    this.sizeMultiplier = multiplier;
+    this.metrics = metrics[size > 0 ? size - 1 : 0];
+}
+
+/**
+ * Get the style of a superscript given a base in the current style.
+ */
+Style.prototype.sup = function() {
+    return styles[sup[this.id]];
+};
+
+/**
+ * Get the style of a subscript given a base in the current style.
+ */
+Style.prototype.sub = function() {
+    return styles[sub[this.id]];
+};
+
+/**
+ * Get the style of a fraction numerator given the fraction in the current
+ * style.
+ */
+Style.prototype.fracNum = function() {
+    return styles[fracNum[this.id]];
+};
+
+/**
+ * Get the style of a fraction denominator given the fraction in the current
+ * style.
+ */
+Style.prototype.fracDen = function() {
+    return styles[fracDen[this.id]];
+};
+
+/**
+ * Get the cramped version of a style (in particular, cramping a cramped style
+ * doesn't change the style).
+ */
+Style.prototype.cramp = function() {
+    return styles[cramp[this.id]];
+};
+
+/**
+ * HTML class name, like "displaystyle cramped"
+ */
+Style.prototype.cls = function() {
+    return sizeNames[this.size] + (this.cramped ? " cramped" : " uncramped");
+};
+
+/**
+ * HTML Reset class name, like "reset-textstyle"
+ */
+Style.prototype.reset = function() {
+    return resetNames[this.size];
+};
+
+/**
+ * Return if this style is tightly spaced (scriptstyle/scriptscriptstyle)
+ */
+Style.prototype.isTight = function() {
+    return this.size >= 2;
+};
+
+// IDs of the different styles
+var D = 0;
+var Dc = 1;
+var T = 2;
+var Tc = 3;
+var S = 4;
+var Sc = 5;
+var SS = 6;
+var SSc = 7;
+
+// String names for the different sizes
+var sizeNames = [
+    "displaystyle textstyle",
+    "textstyle",
+    "scriptstyle",
+    "scriptscriptstyle"
+];
+
+// Reset names for the different sizes
+var resetNames = [
+    "reset-textstyle",
+    "reset-textstyle",
+    "reset-scriptstyle",
+    "reset-scriptscriptstyle"
+];
+
+// Instances of the different styles
+var styles = [
+    new Style(D, 0, 1.0, false),
+    new Style(Dc, 0, 1.0, true),
+    new Style(T, 1, 1.0, false),
+    new Style(Tc, 1, 1.0, true),
+    new Style(S, 2, 0.7, false),
+    new Style(Sc, 2, 0.7, true),
+    new Style(SS, 3, 0.5, false),
+    new Style(SSc, 3, 0.5, true)
+];
+
+// Lookup tables for switching from one style to another
+var sup = [S, Sc, S, Sc, SS, SSc, SS, SSc];
+var sub = [Sc, Sc, Sc, Sc, SSc, SSc, SSc, SSc];
+var fracNum = [T, Tc, S, Sc, SS, SSc, SS, SSc];
+var fracDen = [Tc, Tc, Sc, Sc, SSc, SSc, SSc, SSc];
+var cramp = [Dc, Dc, Tc, Tc, Sc, Sc, SSc, SSc];
+
+// We only export some of the styles. Also, we don't export the `Style` class so
+// no more styles can be generated.
+module.exports = {
+    DISPLAY: styles[D],
+    TEXT: styles[T],
+    SCRIPT: styles[S],
+    SCRIPTSCRIPT: styles[SS]
+};

node_modules/katex/src/buildCommon.js

@@ -0,0 +1,480 @@
+/* eslint no-console:0 */
+/**
+ * This module contains general functions that can be used for building
+ * different kinds of domTree nodes in a consistent manner.
+ */
+
+var domTree = require("./domTree");
+var fontMetrics = require("./fontMetrics");
+var symbols = require("./symbols");
+var utils = require("./utils");
+
+var greekCapitals = [
+    "\\Gamma",
+    "\\Delta",
+    "\\Theta",
+    "\\Lambda",
+    "\\Xi",
+    "\\Pi",
+    "\\Sigma",
+    "\\Upsilon",
+    "\\Phi",
+    "\\Psi",
+    "\\Omega"
+];
+
+// The following have to be loaded from Main-Italic font, using class mainit
+var mainitLetters = [
+    "\u0131",   // dotless i, \imath
+    "\u0237",   // dotless j, \jmath
+    "\u00a3"   // \pounds
+];
+
+/**
+ * Makes a symbolNode after translation via the list of symbols in symbols.js.
+ * Correctly pulls out metrics for the character, and optionally takes a list of
+ * classes to be attached to the node.
+ *
+ * TODO: make argument order closer to makeSpan
+ * TODO: add a separate argument for math class (e.g. `mop`, `mbin`), which
+ * should if present come first in `classes`.
+ */
+var makeSymbol = function(value, fontFamily, mode, options, classes) {
+    // Replace the value with its replaced value from symbol.js
+    if (symbols[mode][value] && symbols[mode][value].replace) {
+        value = symbols[mode][value].replace;
+    }
+
+    var metrics = fontMetrics.getCharacterMetrics(value, fontFamily);
+
+    var symbolNode;
+    if (metrics) {
+        var italic = metrics.italic;
+        if (mode === "text") {
+            italic = 0;
+        }
+        symbolNode = new domTree.symbolNode(
+            value, metrics.height, metrics.depth, italic, metrics.skew,
+            classes);
+    } else {
+        // TODO(emily): Figure out a good way to only print this in development
+        typeof console !== "undefined" && console.warn(
+            "No character metrics for '" + value + "' in style '" +
+                fontFamily + "'");
+        symbolNode = new domTree.symbolNode(value, 0, 0, 0, 0, classes);
+    }
+
+    if (options) {
+        if (options.style.isTight()) {
+            symbolNode.classes.push("mtight");
+        }
+        if (options.getColor()) {
+            symbolNode.style.color = options.getColor();
+        }
+    }
+
+    return symbolNode;
+};
+
+/**
+ * Makes a symbol in Main-Regular or AMS-Regular.
+ * Used for rel, bin, open, close, inner, and punct.
+ */
+var mathsym = function(value, mode, options, classes) {
+    // Decide what font to render the symbol in by its entry in the symbols
+    // table.
+    // Have a special case for when the value = \ because the \ is used as a
+    // textord in unsupported command errors but cannot be parsed as a regular
+    // text ordinal and is therefore not present as a symbol in the symbols
+    // table for text
+    if (value === "\\" || symbols[mode][value].font === "main") {
+        return makeSymbol(value, "Main-Regular", mode, options, classes);
+    } else {
+        return makeSymbol(
+            value, "AMS-Regular", mode, options, classes.concat(["amsrm"]));
+    }
+};
+
+/**
+ * Makes a symbol in the default font for mathords and textords.
+ */
+var mathDefault = function(value, mode, options, classes, type) {
+    if (type === "mathord") {
+        return mathit(value, mode, options, classes);
+    } else if (type === "textord") {
+        return makeSymbol(
+            value, "Main-Regular", mode, options, classes.concat(["mathrm"]));
+    } else {
+        throw new Error("unexpected type: " + type + " in mathDefault");
+    }
+};
+
+/**
+ * Makes a symbol in the italic math font.
+ */
+var mathit = function(value, mode, options, classes) {
+    if (/[0-9]/.test(value.charAt(0)) ||
+            // glyphs for \imath and \jmath do not exist in Math-Italic so we
+            // need to use Main-Italic instead
+            utils.contains(mainitLetters, value) ||
+            utils.contains(greekCapitals, value)) {
+        return makeSymbol(
+            value, "Main-Italic", mode, options, classes.concat(["mainit"]));
+    } else {
+        return makeSymbol(
+            value, "Math-Italic", mode, options, classes.concat(["mathit"]));
+    }
+};
+
+/**
+ * Makes either a mathord or textord in the correct font and color.
+ */
+var makeOrd = function(group, options, type) {
+    var mode = group.mode;
+    var value = group.value;
+    if (symbols[mode][value] && symbols[mode][value].replace) {
+        value = symbols[mode][value].replace;
+    }
+
+    var classes = ["mord"];
+
+    var font = options.font;
+    if (font) {
+        if (font === "mathit" || utils.contains(mainitLetters, value)) {
+            return mathit(value, mode, options, classes);
+        } else {
+            var fontName = fontMap[font].fontName;
+            if (fontMetrics.getCharacterMetrics(value, fontName)) {
+                return makeSymbol(
+                    value, fontName, mode, options, classes.concat([font]));
+            } else {
+                return mathDefault(value, mode, options, classes, type);
+            }
+        }
+    } else {
+        return mathDefault(value, mode, options, classes, type);
+    }
+};
+
+/**
+ * Calculate the height, depth, and maxFontSize of an element based on its
+ * children.
+ */
+var sizeElementFromChildren = function(elem) {
+    var height = 0;
+    var depth = 0;
+    var maxFontSize = 0;
+
+    if (elem.children) {
+        for (var i = 0; i < elem.children.length; i++) {
+            if (elem.children[i].height > height) {
+                height = elem.children[i].height;
+            }
+            if (elem.children[i].depth > depth) {
+                depth = elem.children[i].depth;
+            }
+            if (elem.children[i].maxFontSize > maxFontSize) {
+                maxFontSize = elem.children[i].maxFontSize;
+            }
+        }
+    }
+
+    elem.height = height;
+    elem.depth = depth;
+    elem.maxFontSize = maxFontSize;
+};
+
+/**
+ * Makes a span with the given list of classes, list of children, and options.
+ *
+ * TODO: Ensure that `options` is always provided (currently some call sites
+ * don't pass it).
+ * TODO: add a separate argument for math class (e.g. `mop`, `mbin`), which
+ * should if present come first in `classes`.
+ */
+var makeSpan = function(classes, children, options) {
+    var span = new domTree.span(classes, children, options);
+
+    sizeElementFromChildren(span);
+
+    return span;
+};
+
+/**
+ * Prepends the given children to the given span, updating height, depth, and
+ * maxFontSize.
+ */
+var prependChildren = function(span, children) {
+    span.children = children.concat(span.children);
+
+    sizeElementFromChildren(span);
+};
+
+/**
+ * Makes a document fragment with the given list of children.
+ */
+var makeFragment = function(children) {
+    var fragment = new domTree.documentFragment(children);
+
+    sizeElementFromChildren(fragment);
+
+    return fragment;
+};
+
+/**
+ * Makes an element placed in each of the vlist elements to ensure that each
+ * element has the same max font size. To do this, we create a zero-width space
+ * with the correct font size.
+ */
+var makeFontSizer = function(options, fontSize) {
+    var fontSizeInner = makeSpan([], [new domTree.symbolNode("\u200b")]);
+    fontSizeInner.style.fontSize =
+        (fontSize / options.style.sizeMultiplier) + "em";
+
+    var fontSizer = makeSpan(
+        ["fontsize-ensurer", "reset-" + options.size, "size5"],
+        [fontSizeInner]);
+
+    return fontSizer;
+};
+
+/**
+ * Makes a vertical list by stacking elements and kerns on top of each other.
+ * Allows for many different ways of specifying the positioning method.
+ *
+ * Arguments:
+ *  - children: A list of child or kern nodes to be stacked on top of each other
+ *              (i.e. the first element will be at the bottom, and the last at
+ *              the top). Element nodes are specified as
+ *                {type: "elem", elem: node}
+ *              while kern nodes are specified as
+ *                {type: "kern", size: size}
+ *  - positionType: The method by which the vlist should be positioned. Valid
+ *                  values are:
+ *                   - "individualShift": The children list only contains elem
+ *                                        nodes, and each node contains an extra
+ *                                        "shift" value of how much it should be
+ *                                        shifted (note that shifting is always
+ *                                        moving downwards). positionData is
+ *                                        ignored.
+ *                   - "top": The positionData specifies the topmost point of
+ *                            the vlist (note this is expected to be a height,
+ *                            so positive values move up)
+ *                   - "bottom": The positionData specifies the bottommost point
+ *                               of the vlist (note this is expected to be a
+ *                               depth, so positive values move down
+ *                   - "shift": The vlist will be positioned such that its
+ *                              baseline is positionData away from the baseline
+ *                              of the first child. Positive values move
+ *                              downwards.
+ *                   - "firstBaseline": The vlist will be positioned such that
+ *                                      its baseline is aligned with the
+ *                                      baseline of the first child.
+ *                                      positionData is ignored. (this is
+ *                                      equivalent to "shift" with
+ *                                      positionData=0)
+ *  - positionData: Data used in different ways depending on positionType
+ *  - options: An Options object
+ *
+ */
+var makeVList = function(children, positionType, positionData, options) {
+    var depth;
+    var currPos;
+    var i;
+    if (positionType === "individualShift") {
+        var oldChildren = children;
+        children = [oldChildren[0]];
+
+        // Add in kerns to the list of children to get each element to be
+        // shifted to the correct specified shift
+        depth = -oldChildren[0].shift - oldChildren[0].elem.depth;
+        currPos = depth;
+        for (i = 1; i < oldChildren.length; i++) {
+            var diff = -oldChildren[i].shift - currPos -
+                oldChildren[i].elem.depth;
+            var size = diff -
+                (oldChildren[i - 1].elem.height +
+                 oldChildren[i - 1].elem.depth);
+
+            currPos = currPos + diff;
+
+            children.push({type: "kern", size: size});
+            children.push(oldChildren[i]);
+        }
+    } else if (positionType === "top") {
+        // We always start at the bottom, so calculate the bottom by adding up
+        // all the sizes
+        var bottom = positionData;
+        for (i = 0; i < children.length; i++) {
+            if (children[i].type === "kern") {
+                bottom -= children[i].size;
+            } else {
+                bottom -= children[i].elem.height + children[i].elem.depth;
+            }
+        }
+        depth = bottom;
+    } else if (positionType === "bottom") {
+        depth = -positionData;
+    } else if (positionType === "shift") {
+        depth = -children[0].elem.depth - positionData;
+    } else if (positionType === "firstBaseline") {
+        depth = -children[0].elem.depth;
+    } else {
+        depth = 0;
+    }
+
+    // Make the fontSizer
+    var maxFontSize = 0;
+    for (i = 0; i < children.length; i++) {
+        if (children[i].type === "elem") {
+            maxFontSize = Math.max(maxFontSize, children[i].elem.maxFontSize);
+        }
+    }
+    var fontSizer = makeFontSizer(options, maxFontSize);
+
+    // Create a new list of actual children at the correct offsets
+    var realChildren = [];
+    currPos = depth;
+    for (i = 0; i < children.length; i++) {
+        if (children[i].type === "kern") {
+            currPos += children[i].size;
+        } else {
+            var child = children[i].elem;
+
+            var shift = -child.depth - currPos;
+            currPos += child.height + child.depth;
+
+            var childWrap = makeSpan([], [fontSizer, child]);
+            childWrap.height -= shift;
+            childWrap.depth += shift;
+            childWrap.style.top = shift + "em";
+
+            realChildren.push(childWrap);
+        }
+    }
+
+    // Add in an element at the end with no offset to fix the calculation of
+    // baselines in some browsers (namely IE, sometimes safari)
+    var baselineFix = makeSpan(
+        ["baseline-fix"], [fontSizer, new domTree.symbolNode("\u200b")]);
+    realChildren.push(baselineFix);
+
+    var vlist = makeSpan(["vlist"], realChildren);
+    // Fix the final height and depth, in case there were kerns at the ends
+    // since the makeSpan calculation won't take that in to account.
+    vlist.height = Math.max(currPos, vlist.height);
+    vlist.depth = Math.max(-depth, vlist.depth);
+    return vlist;
+};
+
+// A table of size -> font size for the different sizing functions
+var sizingMultiplier = {
+    size1: 0.5,
+    size2: 0.7,
+    size3: 0.8,
+    size4: 0.9,
+    size5: 1.0,
+    size6: 1.2,
+    size7: 1.44,
+    size8: 1.73,
+    size9: 2.07,
+    size10: 2.49
+};
+
+// A map of spacing functions to their attributes, like size and corresponding
+// CSS class
+var spacingFunctions = {
+    "\\qquad": {
+        size: "2em",
+        className: "qquad"
+    },
+    "\\quad": {
+        size: "1em",
+        className: "quad"
+    },
+    "\\enspace": {
+        size: "0.5em",
+        className: "enspace"
+    },
+    "\\;": {
+        size: "0.277778em",
+        className: "thickspace"
+    },
+    "\\:": {
+        size: "0.22222em",
+        className: "mediumspace"
+    },
+    "\\,": {
+        size: "0.16667em",
+        className: "thinspace"
+    },
+    "\\!": {
+        size: "-0.16667em",
+        className: "negativethinspace"
+    }
+};
+
+/**
+ * Maps TeX font commands to objects containing:
+ * - variant: string used for "mathvariant" attribute in buildMathML.js
+ * - fontName: the "style" parameter to fontMetrics.getCharacterMetrics
+ */
+// A map between tex font commands an MathML mathvariant attribute values
+var fontMap = {
+    // styles
+    "mathbf": {
+        variant: "bold",
+        fontName: "Main-Bold"
+    },
+    "mathrm": {
+        variant: "normal",
+        fontName: "Main-Regular"
+    },
+    "textit": {
+        variant: "italic",
+        fontName: "Main-Italic"
+    },
+
+    // "mathit" is missing because it requires the use of two fonts: Main-Italic
+    // and Math-Italic.  This is handled by a special case in makeOrd which ends
+    // up calling mathit.
+
+    // families
+    "mathbb": {
+        variant: "double-struck",
+        fontName: "AMS-Regular"
+    },
+    "mathcal": {
+        variant: "script",
+        fontName: "Caligraphic-Regular"
+    },
+    "mathfrak": {
+        variant: "fraktur",
+        fontName: "Fraktur-Regular"
+    },
+    "mathscr": {
+        variant: "script",
+        fontName: "Script-Regular"
+    },
+    "mathsf": {
+        variant: "sans-serif",
+        fontName: "SansSerif-Regular"
+    },
+    "mathtt": {
+        variant: "monospace",
+        fontName: "Typewriter-Regular"
+    }
+};
+
+module.exports = {
+    fontMap: fontMap,
+    makeSymbol: makeSymbol,
+    mathsym: mathsym,
+    makeSpan: makeSpan,
+    makeFragment: makeFragment,
+    makeVList: makeVList,
+    makeOrd: makeOrd,
+    prependChildren: prependChildren,
+    sizingMultiplier: sizingMultiplier,
+    spacingFunctions: spacingFunctions
+};