Multiple frontend support (#110)

* Initial multiple frontend support

* Removed unnecessary require()

* Moved styles/images out of common

app/javascript/packs/application.js

@@ -1,5 +1,11 @@
 import loadPolyfills from '../mastodon/load_polyfills';
 
+// import default stylesheet with variables
+require('font-awesome/css/font-awesome.css');
+require('mastodon-application-style');
+
+require.context('../images/', true);
+
 loadPolyfills().then(() => {
   require('../mastodon/main').default();
 }).catch(e => {