Rename Rails app name just to tidy things up.

This also helps so I don't keep seeing "development" when it's actually
"developer".
Get specs running again (as lackluster as they currently are).

The lack of warden/devise was throwing the controller tests off due to
Mongoid::Userstamp and factories creating api users.
Fix rate limit distributed auto determination.

This was intended to be based on the duration, not the accuracy.
Migrate to new custom rate limits implementation.