Fix typo
Don't call toString at extend time

Doing so will memoize the function so that any Ember.View subclass will return the same value for toString.
[BUGFIX beta] Better error for content set on object
Add Ember.setupForTesting.

This makes it somewhat easier to unit-test Ember. It also gives us a
good place to add additional customization (as opposed to advocating
simply setting `Ember.testing = true`).
Enable features given a 'go' status.

New features as of 2014/01/17:

* `ember-testing-routing-helpers`
* `ember-testing-triggerEvent-helper`
* `computed-read-only`
* `ember-metal-is-blank`
* `ember-eager-url-update`

Also, removed `composable-computed-properties` as it was accidentally
commited in another unrelated PR.
Fixes a typo in the `Ember.Mixin` documentation.
Drop file with un-used observer and childContainer cleanup
Fix a couple of document typos in enumerable
Merge pull request #4184 from mixonic/drop-childContainers

Drop un-used observer and childContainer cleanup
Merge pull request #4191 from fanta/enumarable_typos

[DOC beta] Fix a couple of documentation typos in enumerable
[DOC beta] Document the send method on Ember.ActionHandler
[FEATURE query-params-new] alias computed.reads as computed.oneWay

oneWay is ambiguous. Which way?

Ember.computed.alias is a way more semantically meaningful alias of
Ember.computed.oneWay.

Example: http://jsbin.com/ucanam/3000

Putting this in query params because I'd like to use this
in some of the examples for query params; seems like it'll be
common lightweight pattern for buffering small changes, and
oneWay is just enough of a mental hurdle to necessitate this.
Merge pull request #4112 from machty/computed-reads

[FEATURE query-params-new] alias computed.reads as computed.oneWay
Merge pull request #4192 from bmac/action-handler-send-docs

[DOC beta] Document the send method on Ember.ActionHandler
Update CHANGELOG.md for 1.4.0-beta.3.
[BUGFIX BETA] BREAKING: Fixed how parentController property of an itemController when nested.

When an `itemController` is specified for an ArrayController that itself has a `parentController`
set, the framework was previously setting the itemController's `parentController` property to the
ArrayController's `parentController` instead of the ArrayController itself. This commit fixes that
behavior, and improves the docs, naming, and logic around this case.

If you were relying on an itemController's `parentController` skipping a generation, you will
need to use `parentController.parentController` or better yet, avoid the Law of Demeter
violation and provide a sensible method on the ArrayController that itself delegates to its
`parentController`.
Merge pull request #4183 from KasperTidemann/master

Fixes a typo in the `Ember.Mixin` documentation.
Merge pull request #4159 from rjackson/add_ember_setupForTesting

Add Ember.setupForTesting.
[query-params-new] Don't watch default model params obj

Subtle bug fix with query-params-new, whereby if you
specified queryParams on your ObjectController but
didn't provide you own model hook, the Ember-supplied
model hook, which returns the params object as the 
model in certain cases, was resulting in that params
object being observed, when definitely should not be,
so we make a copy of the POJO before returning it
as the model

Fixes #4155
Merge pull request #4175 from rjackson/update_features-json

Enable features given a 'go' status.