The isolated container exposes some Ember's base classes.

Those classes are automatically registered by Ember:

* Ember.ObjectController
* Ember.ArrayController
* Ember.Controller
* Ember.Route
* Ember.View
* Ember.Select

[Fixes rwjblue/ember-qunit#73]
Merge pull request #4 from cyril-sf/cyril/component-controller

The isolated container exposes Ember's controllers.