Upgrade to Ember 1.11-beta.1

HTMLBars goodness! Since there was some breakage and a lot of fiddling
around to get some things working, I took this opportunity to do a big
cleanup of the whole Ember app. I accidentally worked on some new
features too :3

Note that the app is still broken right now, pending on
https://github.com/emberjs/ember.js/issues/10401

Cleanup:
- Restructuring of components
- Consolidation of some stuff into mixins, cleanup of some APIs that
will be public
- Change all instances of .property() / .observes() / .on() to
Ember.computed() / Ember.observer() / Ember.on() respectively (I think
it is more readable)
- More comments
- Start conforming to a code style (2 spaces for indentation)

New features:
- Post hiding/restoring
- Mark individual discussions as read by clicking
- Clicking on a read discussion jumps to the end
- Mark all discussions as read
- Progressively mark the discussion as read as the page is scrolled
- Unordered list post formatting
- Post permalink popup

Demo once that Ember regression is fixed!

ember/app/routes/application.js

@@ -2,39 +2,38 @@ import Ember from 'ember';
 import ApplicationRouteMixin from 'simple-auth/mixins/application-route-mixin';
 
 export default Ember.Route.extend(ApplicationRouteMixin, {
+  actions: {
+    login: function() {
+      this.controllerFor('login').set('error', null);
+      this.send('showModal', 'login');
+    },
 
-	actions: {
-		login: function() {
-			this.controllerFor('login').set('error', null);
-			this.send('showModal', 'login');
-		},
+    signup: function() {
+      this.controllerFor('signup').set('error', null);
+      this.send('showModal', 'signup');
+    },
 
-		signup: function() {
-			this.controllerFor('signup').set('error', null);
-			this.send('showModal', 'signup');
-		},
+    showModal: function(name) {
+      this.render(name, {
+        into: 'application',
+        outlet: 'modal'
+      });
+      this.controllerFor('application').set('modalController', this.controllerFor(name));
+    },
 
-		showModal: function(name) {
-			this.render(name, {
-				into: 'application',
-				outlet: 'modal'
-			});
-			this.controllerFor('application').set('modalController', this.controllerFor(name));
-		},
+    closeModal: function() {
+      this.controllerFor('application').set('modalController', null);
+    },
 
-		closeModal: function() {
-			this.controllerFor('application').set('modalController', null);
-		},
+    destroyModal: function() {
+      this.disconnectOutlet({
+        outlet: 'modal',
+        parentView: 'application'
+      });
+    },
 
-		destroyModal: function() {
-			this.disconnectOutlet({
-				outlet: 'modal',
-				parentView: 'application'
-			});
-		},
-
-		sessionChanged: function() {
-		    this.refresh();
-		}
-	}
+    sessionChanged: function() {
+        this.refresh();
+    }
+  }
 });