Remove another duplicate changelog entry.
[NICETHING beta] Expose helpful vars in {{debugger}} helper body

Folk often don't know what to do within `{{debugger}}`.
This should give them a little more to work with.
[BUGFIX beta] contextualizeBindingPath should be aware of empty paths
[FEATURE propertyBraceExpansion] Ensure __ember_observes__ is set properly.

The refactor in 5d95885 to allow only the declarative form of expansion
caused the `__ember_observes__` property to be unset when the feature
was enabled.

This was identified while fixing the Travis asset publishing and build
failures in #3863.

@twokul / @rjackson

/cc @hjdivad
Do not allow overwriting of controllers proxy properties

It was possible to accidentally set the value of `controllers.foo`, where
foo is a container-retrieved controller value as specified using `needs`.

There is no case where a developer would want to do this on purpose, and
it can cause confusion. This commit throws an error when this occurs.
render helper with context, now creates the controller
with its model, rather than setting the model post creation.

Setting the context post creating causes unneeded and wasteful change events.

@hjdivad & @stefanpenner
remove Ember.alias as it has been deprecated since 2013-01-08
Optimizes `{{#unbound if}}` and `{{#unbound unless}}`.

They no longer create useless metamorph views and generally execute
less code. There is no public API change here, just optimization.

Props to @machty for the review and help.
Remove long deprecated Ember.Button
[BUGFIX beta] Update to latest `ember-dev`.

* Updates to the latest `ember-dev` which ensures that the `git config
  user.name` and `git config user.email` values are present before calling
  `git cherry-pick`. This is due to a recent change in git `1.8.5` which
  requires the user information be present prior to a cherry-pick.
* Updates to bundler `1.5.0.rc1` to use the following features:
  * Automatically retry 3 times (should help with gem installation failures
    in Travis).
  * Install gems in parallel (use 4 workers by default).
* Forces each branch to be tested independently (prevents a resource
  contention issue when checking out another branch in the same test
  run).
* Travis accidentally reverted to using an older git version that does not
  support the `--points-at` flag that we are using in `ember-dev`.  This
  forces the system to upgrade to the latest version.

Travis ticket for reference:
  https://github.com/travis-ci/travis-ci/issues/1710.
[BUGFIX beta] Ensure features are tested by Travis.

 #3635 caused the Travis builds to use the `enableallfeatures` flag to
 enable features, but this was changed in `ember-dev` (and updated in
 Ember in #3633) to `enableoptionalfeatures`.
move Ember.inspect to ember-metal
Ember.computed.readOnly

Basically nearly every time one uses oneWay, one actually
want's to also ensure no data propagates back up. Rather then
constantly using `oneWay` and `readOnly` in conjunction, this
merely combines them.
[BUGFIX beta] Update to latest Backburner.js.

From https://github.com/ebryn/backburner.js/pull/54:

    Fix a bug where debounced item in index 0 isn't
    removed unless debounce for that target/method is called again, but
    then it's in index 0 and then isn't removed

[Compare
view](https://github.com/ebryn/backburner.js/compare/d6bc31f978eb0ef0c8288c1bef9d08420caff00a...afa5f6e22541772fbc702e2e1d7a3afc480b66b1)
[BUGFIX beta] Ensure that each branch is bundled before building.

This resolves an issue that occurs when the `Gemfile.lock` differs
between branches.
[DOC beta] Clarify context of a component's block.
[BUGFIX beta] Add preventDefault option to link-to and action.

Resolves #3737
ensure all public API's of the container are correctly normalized and validated.

Also ensure internal usages are not validated nor re-normalized.
Updating run loop documentation

Backburner was updated and the documentation for
throttle/debounce/cancel needs to be updated to reflect
new functionality
Ensure 1.3.0 features are on by default in master/canary.

The 1.3.0
[features.json](https://github.com/emberjs/ember.js/blob/v1.3.0-beta.2/features.json)
for reference.