use Ember.K for consistency

Unless there's a reason behind using just `function() {}`, it seems more reasonable to use Ember.K for consistency
upload prod builds to s3
Merge pull request #3003 from fivetanley/upload-prod-builds

upload prod builds to s3
Merge pull request #3001 from raulbrito/patch-3

use Ember.K for consistency
Fix: didInsertElement was fired twice

Happens when a ContainerView is created during the didInsertElement event of
its parent ContainerView
Support indeterminate property in checkboxes
Merge pull request #3004 from alexspeller/bind-indeterminate-attribute-in-checkbox

Support indeterminate property in checkboxes