Ember.Route.transitionTo macro

add helper macro Ember.Route.transitionTo
I've found I use this all the time. any downside to adding it to the actual api?


```javascript
App.IndexRoute = Ember.Route.extend({
  events: {
    didSave: Ember.Route.transitionTo("post.show")
  }
});

// or short

transitionTo = Ember.Route.transitrionTo;

App.IndexRoute = Ember.Route.extend({
  events: {
    didSave: transitionTo("post.show")
  }
});

```