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.