zendesk/ember.js — pull request #35 by jamesarosen (2014-01-23 18:01:51+00:00)
Title: Backport Ember.isEmpty

@shajith @ebryn

Ember 1 deprecates `Ember.empty` in favor of `Ember.isEmpty`. This introduces a flag,
`EMBER_EMPTY`, with two values:

* `null` (the default) -- `Ember.empty` and `Ember.isEmpty` both work without warning
* `"1.0"` -- `Ember.empty` continues to work, but emits warnings