[DOC] Correction for `ActionHandler` implementing classes
[BUGFIX beta] Throw error on `Maximum call stack size exceeded`
[BUGFIX beta] Upgrade Backburner to 0.2.0
[BUGFIX beta] Ember.onerror now uses Backburner's error handler - #3401
Merge pull request #4562 from emberjs/backburner-upgrade

[BUGFIX beta] Upgrade Backburner, Switch Ember.onerror to Backburner's handler
Update enumerable_utils.js

-It should be 'removed' not 'remove'
-'modified' sounds better than 'changed'
Revert "[BUGFIX beta] Upgrade Backburner to 0.2.0"

This reverts commit 736effe8343d9fc76447a6584895520e663bb97d.
Revert "[BUGFIX beta] Ember.onerror now uses Backburner's error handler - #3401"

This reverts commit 022c1f624e1a8e010f7134378f991f90c23ac523.
Merge pull request #4565 from rjackson/revert-backburner-update

Revert Backburner update due to Phantom Failures
[BUGFIX beta] Total invalidation of arrayComputed by non-array dependencies should be synchronous
Ensure run loop queues are only added once.
Merge pull request #4580 from rjackson/ensure-queues-added-once

Ensure run loop queues are only added once.
Merge pull request #4491 from selvagsz/bugfix_inject_unlooked_controller_on_controllers

[BUGFIX beta] Fix `Maximum call stack size exceeded` error when injecting un-lookup'd controller on controllers
[DOC] Improve register/inject documentation
Merge pull request #4577 from mixonic/improve-register-inject

[DOC] Improve register/inject documentation
dragOver was missing
Minor fix for to detect `find` method

Fixes #4583
Merge pull request #4478 from bradfol/doc-actionhandler

[DOC] Correction for `ActionHandler` implementing classes
Merge pull request #4563 from kalmanh/patch-1

Minor documentation update: Update enumerable_utils.js
Cleanup unused var