Fix typo
[BUGFIX beta] Better error for content set on object
[DOC beta] Update filterBy docs to show that the value can be any type
Remove old reference to RootResponder
[DOCS beta] Mention passing identifiers to `transitionTo`
Merge pull request #4403 from chancancode/fix_routing_docs

[DOCS beta] Mention passing identifiers to `transitionTo`
[DOC beta] Clarified sort description

sort() is comparing comparator result being >0 or <0, it does not depend on strict 1 or -1. With original documentation people wanting to comply with specification they need to do if( a === b ) { return 0; } else { if( a > b ) { return -1; } else { return 1; } instead of simple subtraction.
[BUGFIX beta] Handle ES6 transpiler errors.
Merge pull request #4410 from rjackson/handle-compiler-errors

[BUGFIX beta] Handle ES6 transpiler errors.
[FEATURE ember-routing-auto-location] Prepend location.origin to location.replace attempts
Merge pull request #4411 from jayphelps/auto-location-security

[FEATURE ember-routing-auto-location] Prepend location.origin to location.replace attempts
[DOC beta] Fix link to `Ember.ControllerMixin#replaceRoute`
Merge pull request #4415 from tricknotes/fix-link-in-doc

[DOC beta] Fix link to `Ember.ControllerMixin#replaceRoute`
[DOC beta] typo in docs
Merge pull request #4416 from lholmquist/typo

typo in docs
Merge pull request #4096 from knownasilya/arraycontroller-not-array

[BUGFIX beta] Better error for object set on ArrayProxy
[beta] Use documentElement instead of body for ember-extension detection
Merge pull request #4397 from Kerrick/update-docs

Update filterBy docs to show that the value can be any type
Update CHANGELOG for 1.5.0-beta.2.
[BUGFIX beta] Use better ajax events for counters

Using `ajaxSend` and `ajaxComplete` instead of `ajaxStart` and
`ajaxStop`. See http://api.jquery.com/ajaxSend/ and
http://api.jquery.com/ajaxComplete/ for more information on each one.

It turns out that `ajaxStart` and `ajaxStop` are only called when the
request in question is the only one running. This is problematic for the
`wait()` helper. Changing to events that are called on _every_ request
fixes this problem.