Use webpack for promise polyfill and font-awesome

notebook/lab/index.js

@@ -2,6 +2,8 @@
 // Distributed under the terms of the Modified BSD License.
 'use strict';
 
+// Load CSS.
+require('font-awesome/css/font-awesome.min.css');
 require('jupyter-js-plugins/lib/default-theme/index.css');
 
 // ES6 Promise polyfill

notebook/lab/package.json

@@ -7,6 +7,7 @@
   "typings": "lib/index.d.ts",
   "dependencies": {
     "es6-promise": "^3.1.2",
+    "font-awesome": "^4.6.1",
     "jupyter-js-plugins": "^0.11.8",
     "phosphide": "^0.9.0"
   },

notebook/templates/lab.html

@@ -6,8 +6,6 @@
 
     <title>{{page_title}}</title>
     <meta http-equiv="X-UA-Compatible" content="IE=edge" />
-    <link rel="stylesheet" type="text/css" href="{{static_url("components/font-awesome/css/font-awesome.css")}}"></link>
-    <script src="{{static_url("components/es6-promise/promise.min.js")}}" type="text/javascript" charset="utf-8"></script>
     <script src="{{static_url("components/requirejs/require.js") }}" type="text/javascript" charset="utf-8"></script>
     <script>
       require.config({