[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.
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
Merge pull request #4011 from ebryn/update-backburner

[BUGFIX release] Update Backburner.js