Generated documentation updates.

* Adds `RSVP` back (via `bower_components/` directory).
* Remove `container` (this is considered private API).
* Remove `metamorph` (it is not used anymore).
* Remove `loader` (there are no docs and it is not public API).
* Add `ember-routing-handlebars`.
Merge pull request #5474 from rwjblue/enable-rsvp-in-docs

Generated documentation updates.
Prevent extra method.toString checks.

It appears that the intent here was to only check the
`method.toString().indexOf('_super')` once, and store the result so that
we do not need to check the same method twice, but we were never actual
storing `__hasSuper` on the method so it was just always going to check
the `toString`.
Merge pull request #5480 from rwjblue/prevent-extra-toStrings

Prevent extra method.toString checks.
String.prototype.indexOf returns -1 for non-matches.

Previous check would wrap everything (unless `_super` was at position
`0` which is not possible).
Merge pull request #5481 from rwjblue/properly-use-indexOf

String.prototype.indexOf returns -1 for non-matches.
[DOC release] Update Ember.computed with depKeys and example
Merge pull request #5486 from knownasilya/docs-computed-dep-keys

[DOC release] Update Ember.computed with depKeys and example
Pull in LazyValue and ember-metal integration
Import streamFor
streamy views