Swap clipboard for polyfill, removing dependency on node API

Author: jcrowthe

app/index.html

@@ -24,6 +24,7 @@
 <link rel="stylesheet" href="styles/main.css">
 <script src="bower_components/webcomponentsjs/webcomponents-lite.js"></script>
 <script src="bower_components/fuse.js/dist/fuse.min.js"></script>
+<script src="scripts/clipboard-polyfill.js"></script>
 <link rel="import" href="elements/elements.html">
 </head>
 

app/scripts/app.js

@@ -13,7 +13,6 @@ limitations under the License.
 */
 
 // Setup Electron process integration
-const clipboard = require('electron').clipboard;
 const ipcRenderer = require('electron').ipcRenderer;