ES6: Map.prototype.clear
no need using ‘delete’ es3safe handles this for us.
es6 31.1.3.5

* ensure the arity for map.forEach is 1
* ensure that regardless of size if the callback is not callable we throw and exception
Merge pull request #5648 from stefanpenner/es6-map-stuff

Es6 map stuff
[BUGFIX beta] Enable setProperties to work on Object.create(null) object.
Merge pull request #5647 from rwjblue/ember-keys-for-set-properties

[BUGFIX beta] Enable setProperties to work on Object.create(null) object.
Remove duplicate _MetamorphView
Minor changes to collection and view helpers

Based on feedback from
[here](https://github.com/emberjs/ember.js/commit/94510518341b14b67560623d774c92f2c4645fec).
Merge pull request #5649 from twokul/prop-fix

Minor changes to collection and view helpers
Merge pull request #5597 from mmun/two-metamorphs-walk-into-a-bar

Remove duplicate _MetamorphView
Cleaning up `{{loc}}`

  * Simplify helper by just re-exporting StringUtils.loc
  * Removes inline script style example
  * Adds example Ember.String setup and resulting output
Remove documentation for {{template}}

{{template}} was deprecated in favor or {[partial}} before 1.0 in
ea5456ac on 2013-07-19.
Merge pull request #5652 from trek/expand-loc-helper-documentation

Cleaning up `{{loc}}`
Merge pull request #5653 from trek/remove-docs-for-deprecated-template-helper

Remove documentation for {{template}}
[Bugfix beta] update RSVP to 3.0.14 (faster instrumentation)
Merge pull request #5658 from stefanpenner/rsvp-faster-instrumentation

[Bugfix beta] update RSVP to 3.0.14 (faster instrumentation)
Fix regex to match Windows line endings

Fixes #5662
Merge pull request #5664 from concreted/patch-3

Fix regex to match Windows line endings
[BUGFIX beta] SVG support for metal-views

This greatly improves SVG support in metal-view by basing the current
namespace off the contextual element. SVG components like {{somePath
should be viable with this change.
[BUGFIX beta] Use domHelper for setting attributes, allows camelCase attrs