Let's try Rubinius on Heroku.
Remove unused mixin.
Some field mappings for Catalog.Video.
Reimplement list editors and save action.
Conform video API to Ember Data's RESTAdapter JSON conventions.

It was that or write my own adapter.  The latter didn't seem appealing
enough to overcome the inconvenience of dealing with objects in arrays.

(This actually gives me a good reason to write up about the intentional
ambiguity of "name" in all of these records and how they're meant to be
resolved to more useful names, so maybe it wasn't so bad after all.)