add Ember.computed.defaultTo
Methods which return arrays created within them should call Ember.A
document the create method in for subclasses of Ember.Object
Merge pull request #2175 from fivetanley/document-create

document the create method in for subclasses of Ember.Object
document the init function for Ember.CoreObject
remove redundant example and fix nonsensical grammar
Merge pull request #2174 from fivetanley/document-init

document the init function for Ember.CoreObject
Fix issue where classNameBindings can try to update removed DOM element.

Ember.View#registerObserver now uses states to invoke observers only when there is an element for them to operate on. This avoids a class of issues that can arise when observers are triggered even though the element has been removed from the DOM.
Merge pull request #2185 from lukemelia/avoid-addClass-on-null-element

Fix issue where classNameBindings can try to update removed DOM element.
[fixes #2189] #render was declared as @method action
Merge pull request #2193 from stefanpenner/master

[fixes #2189] #render was declared as @method action
Docs: Ember.run.once with anonymous functions

Added warning in the docs that passing identical anonymous functions to Ember.run.once will still schedule the functions to be called twice.
Merge pull request #2195 from machty/patch-1

Docs: Ember.run.once with anonymous functions
[fixes #2196] Enumberable#firstObject and #lastObject are computed
properties, for property access get should be used. This updates the
documentation accordingly
Merge pull request #2197 from stefanpenner/master

[fixes #2196] Enumberable#firstObject and #lastObject are computed
Fix typo in Ember.String#classify doc
Merge pull request #2200 from bradleypriest/patch-1

Fix typo in Ember.String#classify doc
Merge pull request #2167 from gavacho/fix-array-methods

Methods which return arrays created within them should call Ember.A
Fix order of argument name and its type in document
Fix argument type

`opts` is optional argument.