This PR will upgrade the ember version to 1.13.2 and also include changes to make paper compatible with 1.13.2.

Specifically this is done:

• Change to 1.13.2 of emberjs.

• The use of nearestOfType (paper-sidenav-toggle component) does not seem to work in 1.13.2. Instead a global event bus is used here. The event bus can come handy for other components as well. The event bus principle is explained quite nicely here. As of such one can now trigger from any component:

      paperEventBus: Ember.inject.service('paper-eventbus'),
      someAction: function () {
          this.get("paperEventBus").publish('paper:toggle-sidenav');
          // or 
          this.get("paperEventBus").publish('paper:expand-sidenav'); 
      }

  Obviously this event-bus is global, so it should only be used for global components. One could also make these events non-global by adding attribute to the event name. i.e. .publish('paper:toggle-sidenav-' + this.get("menuhandle")'). Though I do not think this is necessary for the sidenav component.
  EDIT: using parentView now.

• Updated {{#if template}} to respective {{#if hasBlock}}. ( With respective mixin to add support for pre 1.13.X releases).

• Updated ember-prism to 0.0.5.