Do not use `Ember.TEMPLATES` for template storage.

Allow template lookup in the following order:

* `Ember.TEMPLATES`
* `requirejs._eak_seen` (EAK & EAKR resolver)
* `EasyForm.Config._templates`
Merge pull request #79 from rjackson/dont_use_ember_templates

Do not use `Ember.TEMPLATES` for template storage.