[FEATURE ember-routing-auto-location] Adds location: 'auto' option to Router via Ember.AutoLocation
Ensure that TextSupport includes TargetActionSupport.

Closes #4206.
Merge pull request #4207 from rjackson/include_target_action_support_in_text_support

Ensure that TextSupport includes TargetActionSupport.
Merge pull request #3725 from jayphelps/auto-location-again

Ember.AutoLocation support