Fix typo
[BUGFIX beta] Better error for content set on object
[BUGFIX beta] Still update HTML5 history if the previous state was null

Fixes #3195, Closes #3580
Uses document.contains to figure if element exists in the DOM

addresses issue raised in
https://github.com/Polymer/ShadowDOM/issues/365#issuecomment-33509711
[BUGFIX beta] HashLocation no longer looks the hash up with location.hash because of a Firefox decode bug. Fixes #4262
[FEATURE ember-eager-url-update] link-to should generate the url if it eagerly updates it, not use href because it includes rootURL. Fixes #1244
Merge pull request #4312 from jayphelps/link-to-update-url

[FEATURE ember-eager-url-update] link-to should generate the url if it eagerly updates it, not use the href because it includes rootURL. Fixes #1244
Merge pull request #4297 from jayphelps/location-hash-decode

[BUGFIX beta] HashLocation no longer looks the hash up with location.hash because of a Firefox decode bug. Fixes #4262
[BUGFIX beta] Support Handlebars ~> 1.0.

Ember is compatible with Handlebars versions from 1.0.0 forward.
Merge pull request #4316 from rjackson/unlock-handlebars-version

[BUGFIX beta] Support Handlebars ~> 1.0.
[NICETHING beta] prevent value= with input type='select'

Fixes #4319
Merge pull request #4321 from machty/prevent-checkbox-value-dumbletons

[NICETHING beta] prevent value= with input type='select'
[beta] Remove `propertyBraceExpansion` feature flags for 1.4.0.
[beta] Remove `ember-metal-run-bind` feature flags for 1.4.0.
[beta] Remove `with-controller` feature flags for 1.4.0.
[SECURITY CVE-2014-0046] Ensure link-to non-block escapes title.
Add Ember.Handlebars.getEscaped.
Fix simpleBind refactor to use Ember.Handlebars.getEscaped.
[FEATURE ember-handlebars-log-primitives] Enable by default.
[FEATURE ember-routing-inherits-parent-model] Enable by default.