Add Function#bind polyfill to placate PhantomJS

Signed-off-by: Alex Coles <alex@alexbcoles.com>

frontend/app/global.js

@@ -30,6 +30,10 @@
 //
 // dependencies required by classic (Rails) and Angular application.
 
+// NOTE: currently needed for PhantomJS to support Webpack's style-loader.
+// See: https://github.com/webpack/style-loader/issues/31
+require('polyfill-function-prototype-bind');
+
 require('jquery');
 require('jquery-migrate/jquery-migrate');
 require('jquery-ujs');

frontend/package.json

@@ -45,6 +45,7 @@
     "file-loader": "^0.8.1",
     "json-loader": "^0.5.1",
     "lodash": "^2.4.1",
+    "polyfill-function-prototype-bind": "0.0.1",
     "shelljs": "^0.3.0",
     "style-loader": "^0.8.2",
     "url-loader": "^0.5.5",