@dylanfareed => Added management of client applications.

This is a pretty straightforward UI to list, create, edit and destroy Artsy API v2 client applications.

![screen shot 2014-08-26 at 4 05 35 pm](https://cloud.githubusercontent.com/assets/542335/4050875/663a3e98-2d5c-11e4-9494-532a6a37661a.png)

For some reason destroy confirmations aren't working (no popup). Couldn't figure it out, will open an issue.
The rule of thumb of such an API is to call out types. It's very possible that an `/artworks` endpoint returns a collection of artworks, but also returns the corresponding collection of artists, if it makes sense. This is how we can grow the responses without hurting existing clients.