New resque web

Change out the resque web interface for the more modern [resque-web](https://github.com/resque/resque-web).

The main feature gain is the separate failed queue per job queue. On the other hand we lose the 'Scheduler' and 'Retry' tabs that are added by our resque plugins. Neither of the tabs were useful for Kochiku though.

How do people feel about this? It's just something I thought was worth trying.

@square/kochiku-contributors @tarcieri