Ember.Deferred now handles optional then handlers.
Merge pull request #2677 from stefanpenner/fix_deferred

Ember.Deferred now handles optional then handlers.
Merge pull request #2678 from stefanpenner/master

bump ember-dev this should complete the removal of the dependency cycle
bump ember-dev to resolve bad console.log filter in prod
bump handlebars-source – many handlebars bug fixes