Refactor index pane

So that it only loads when needed, and caches results so things are
nice and snappy

ember/app/routes/index/index.js

@@ -1,21 +0,0 @@
-import Ember from 'ember';
-
-import AddCssClassToBodyMixin from '../../mixins/add-css-class-to-body';
-
-export default Ember.Route.extend(AddCssClassToBodyMixin, {
-
-	// When we enter the discussions list view, we no longer want the
-	// discussions list to be in pane mode.
-    setupController: function(controller, model) {
-        this.controllerFor('index').set('paned', false);
-        this.controllerFor('index').set('paneShowing', false);
-        this._super(controller, model);
-    },
-
-    actions: {
-	    didTransition: function() {
-	    	// @todo only if it's not a new discussion
-	    	this.controllerFor('composer').send('minimize');
-	    }
-	}
-});