Strip extraneous locale info from moment

By default, the node bundle for moment includes internationalization data and functionality for ~100 locales.  We aren't using those, so strip them from the webpack output.

See: moment/moment#2416

webpack/base.js

@@ -36,6 +36,7 @@ module.exports = function() {
     }),
     new ExtractTextPlugin('application.css'),
     new BabiliPlugin(),
+    new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
   ];
 
   if (isProd) {