[BUGFIX beta] pass context to sortFunction to avoid calling __nextSuper on undefined
[Bugfix beta] sync backburner

* no longer deopt during run-loop flush (due to usage of try/catch)
* workaround older IE's lack of "catch" in try/finally statement bug
[DOC] Clarify where a controllers `target` property gets defined

The previous documentation was correct but still required a little
digging to find the actual place where the injection is defined.
Merge pull request #4756 from praxxis/clarify_controller_target_injection

[DOC] Clarify where a controllers `target` property gets defined
[FEATURE ember-routing-will-change-hooks] finer-grain transition hooks

Brought to you by @ef4, and demonstrated at his
EmberConf talk:

http://confreaks.com/videos/3302-emberconf2014-animations-and-transitions-in-an-ember-app

See this router.js PR for details:

https://github.com/tildeio/router.js/pull/89
[Bugfix beta] Namespaces are now required to start with uppercase A-Z. Lowercase namespaces were deprecated long ago, and scanning for them was causing issues on certain Android devices.
[DOC release] Fix doc for startRouting in ember-application
Merge pull request #4763 from keydunov/master

[DOC release] Fix doc for startRouting in ember-application
[BUGFIX beta] reduceComputed detect retain:n better.

Fix #4620.

reduceComputed tries to skip walking all observer contexts when an item property
changes if the current tracked array state is [retain:n].  However, this check
occurs while applying the operations.  If [delete:m retain:(n-m)] is applied,
when the retain operation is visisted it will have been updated to retain:n.

This commit updates the check so that retain:n is only checked for the *first*
operation.
Merge pull request #4761 from hjdivad/fix-4620

[BUGFIX beta] reduceComputed detect retain:n better.
[DOC] Update assertion texts for Ember.Resolver

In 7626bc81233f98c229bf9aba0b240f41ab279aff the `Ember.AbstractResolver`
has been renamed to `Ember.Resolver`, but the assertion texts where not
updated accordingly.
Merge pull request #4766 from pangratz/assertions

[DOC] Update assertion texts for Ember.Resolver
Merge pull request #4760 from machty/ef4-transition-hooks

[FEATURE ember-routing-will-change-hooks] finer-grain transition hooks
Merge pull request #4738 from kongregate/fix-android-webview-crash

Don't access the webkitNotifications object while processing namespaces....
Merge pull request #4754 from stefanpenner/sync-bb

sync BB
cleanup + jshint
[Feature ember-metal-map-to-array]
Merge pull request #4772 from stefanpenner/map-to-array

[FEATURE ember-metal-map-to-array]
Merge pull request #4678 from sly7-7/quick-fix-sortable

[BUGFIX beta] pass context to sortFunction to avoid calling __nextSuper ...
Revert "[Feature ember-metal-map-to-array]"

This reverts commit c5714d299f2161961c0bce2358650080a3fcaa76.

This implements value not toArray, I was on crack when I wrote this.