Replace vendored KaTeX with package from npm

Remove our vendored copy of KaTeX and use the package from npm.

This will make it easier to update KaTeX in future. The version being
used here is exactly the same (0.1.1) as the version we previously had
checked into src/sidebar/vendor.

npm-shrinkwrap.json

@@ -3465,6 +3465,12 @@
       "resolved": "https://registry.npmjs.org/karma-sinon/-/karma-sinon-1.0.5.tgz",
       "dev": true
     },
+    "katex": {
+      "version": "0.1.1",
+      "from": "katex@0.1.1",
+      "resolved": "https://registry.npmjs.org/katex/-/katex-0.1.1.tgz",
+      "dev": true
+    },
     "kew": {
       "version": "0.7.0",
       "from": "kew@>=0.7.0 <0.8.0",

package.json

@@ -66,6 +66,7 @@
     "karma-mocha-reporter": "^2.0.4",
     "karma-phantomjs-launcher": "^1.0.1",
     "karma-sinon": "^1.0.5",
+    "katex": "^0.1.1",
     "lodash.debounce": "^4.0.3",
     "lodash.get": "^4.3.0",
     "mkdirp": "^0.5.1",
@@ -118,8 +119,7 @@
   },
   "browser": {
     "annotator": "./src/annotator/vendor/annotator.js",
-    "hammerjs": "./node_modules/hammerjs/hammer.js",
-    "katex": "./src/sidebar/vendor/katex.js"
+    "hammerjs": "./node_modules/hammerjs/hammer.js"
   },
   "browserify-shim": {
     "annotator": {

scripts/gulp/vendor-bundles.js

@@ -38,6 +38,5 @@ module.exports = {
   //    when including the bundle in another project.
   noParseModules: [
     'jquery',
-    'katex',
   ],
 };

src/karma.config.js

@@ -57,7 +57,6 @@ module.exports = function(config) {
     browserify: {
       debug: true,
       extensions: ['.coffee'],
-      noParse: [require.resolve('./sidebar/vendor/katex')],
       configure: function (bundle) {
         bundle.plugin('proxyquire-universal');
       },
@@ -65,7 +64,7 @@ module.exports = function(config) {
       transform: [
         'coffeeify',
         istanbul({
-          ignore: ['**/node_modules/**', '**/katex.js', '**/*.html', '**/*.svg'],
+          ignore: ['**/node_modules/**', '**/*.html', '**/*.svg'],
 
           // There is an outstanding but with karma-converage and istanbul
           // in regards to doing source mapping and transpiling CoffeeScript