Added deprecations for:    * Ember.copy - https://github.com/emberjs/rfcs/pull/322  * Ember.Copyable - https://github.com/emberjs/rfcs/pull/322  * Ember.Map - https://github.com/emberjs/rfcs/pull/237  * Ember.OrderedSet - https://github.com/emberjs/rfcs/pull/237  * Ember.MapWithDefault - https://github.com/emberjs/rfcs/pull/237  * Deprecate accessing jQuery.Event#originalEvent - https://github.com/emberjs/rfcs/pull/294