[beta] Replaces anonynoums functions with named ones
[DOC beta] Assert if template for {{render}} not found.

Added an assertion if the template name provided to `{{render}}` was not
found.

Two tests were previously not working properly, and have been fixed. They registered
templates as `"blog/post"`, which is never looked up with `{{render}}` (as any
slashes in the name are translated to a period before this lookup
happens).

Resolves #3926.
Assert if {{render}} is called with an unquoted name.

Eventually, `{{render}}` should be similar to `{{partial}}` where an
unquoted templateName is used to do bound parameter lookup.

This PR updates the tests to use quotes, and adds an assertion if an
unquoted param was provided.
unbound helper supports bound helper static strings
Ember.run.proxy + Ember.run.method

run-loop aware helpers for more ergonomic integration
with 3rd party asynchronous callbacks.
[DOC beta] Ember.View documentation cleanup.
[DOC beta] Several doc fixes
[DOC beta] Cleanup Ember.TrackedArray docs.
Label promises for debugging
[beta] Update handlebars to 1.2.1.
Merge pull request #3927 from rjackson/warn_on_missing_template

[DOC beta] Assert if template for {{render}} not found.
Merge pull request #4002 from twokul/runloop-doc-fixes

[DOC beta] Several doc fixes
Merge pull request #4003 from rjackson/cleanup_tracked_array

[DOC beta] Cleanup Ember.TrackedArray docs.
Merge pull request #4001 from rjackson/view_doc_cleanup

[DOC beta] Ember.View documentation cleanup.
Merge pull request #3944 from rjackson/cleanup_unquoted_render_usage

Assert if {{render}} is called with an unquoted name.
Merge pull request #3946 from teddyzeenny/new-promise-labels

Label Promises
Merge pull request #3999 from rjackson/update_handlebars

[beta] Update handlebars to 1.2.1.
[BUGFIX release] Update Metamorph

Fixes https://github.com/tomhuda/metamorph.js/issues/30 and https://github.com/emberjs/ember.js/issues/3779
Merge pull request #4010 from ebryn/update-metamorph

[BUGFIX release] Update Metamorph
[BUGFIX release] Update Backburner.js

Includes improved debug performance