Upgrade ember-touch to work with rc2, using container and internal
changes

- Remove `GestureDelegates` & `RegisteredGestures` classes to be managed
in the ApplicationGestureManager instance.

- Init the `ApplicationGestureManager` and common gestures with
  initializers statements.

- The `ApplicationGestureManager` instance is registered in the
  application container.
Merge branch 'master' of github.com:emberjs-addons/ember-touch

* 'master' of github.com:emberjs-addons/ember-touch:
  Delete unused files
  gestureManager Please ent to work with rc2, using container and internal changes
  Upgrade ember-touch to work with rc2, using container and internal changes