Move Ember Admin to use es6 modules

- adds required dependencies to package.json
 and to bower.json
- added required Grunt tasks to transpile and
 concat ember admin files

ghost/admin/app.js

@@ -1,6 +1,8 @@
 /*global Ember */
 
-var App = Ember.Application.create({
+import Resolver from 'ember/resolver';
+
+var App = Ember.Application.extend({
     /**
      * These are debugging flags, they are useful during development
      */
@@ -9,6 +11,8 @@ var App = Ember.Application.create({
     LOG_TRANSITIONS: true,
     LOG_TRANSITIONS_INTERNAL: true,
     LOG_VIEW_LOOKUPS: true,
-    rootElement: '#ember-app' // tells ember to inject this app into element with selector #ember-app
+    modulePrefix: 'ghost', // TODO: loaded via config
+    Resolver: Resolver['default']
 });
 
+export default App;

ghost/admin/router.js

@@ -1,9 +1,11 @@
-/*global App */
+/*global Ember */
 
-App.Router.map(function () {
+// ensure we don't share routes between all Router instances
+var Router = Ember.Router.extend();
+
+Router.map(function () {
     'use strict';
-    this.resource('posts');
+
-    this.resource('post', {path: 'post/:id'}, function () {
-        this.route('edit');
-    });
 });
+
+export default Router;

ghost/admin/templates/index.hbs

@@ -0,0 +1 @@
+<em>This is the index route</em>