Implement redesign, refactor everything

- Write CSS for everything, update templates.
- Refactor discussion view. Stream is split into two components
(content and scrubber) which have their own responsibilities.
- Extract pane functionality into a mixin.
- Implement global “back button” system. You give a “paneable” target
to the application controller, the back button will modulate its
pane-related properties as necessary, and call an action when the
button is clicked.
- Extract welcome-hero into its own component.
- Lots of other general improvements/refactoring. The code is quite
well-commented so take a look!

ember/app/router.js

@@ -1,14 +1,13 @@
 import Ember from 'ember';
 import config from './config/environment';
 
-console.log(config.locationType);
 var Router = Ember.Router.extend({
   location: config.locationType
 });
 
 Router.map(function() {
 
-	this.resource('discussions', {path: '/'}, function() {
+	this.resource('index', {path: '/'}, function() {
         this.resource('discussion', {path: '/:id/:slug'}, function() {
         	this.route('near', {path: '/:near'});
         });