mhfs/devise-async — pull request #17 by jperville (2012-11-16 10:29:54+00:00)
Title: Added support for "QueueClassic" backend.

Please find in this pull request a new [QueueClassic](https://github.com/ryandotsmith/queue_classic) backend for devise-async.

Since testing QueueClassic requires access to a real postgres database I used mocks instead.
The QC API is simple enough but to be sure I also validated my new adapter on my own rails application.

Please note: queue_classic does not listen to a placeholder queue like Resque, so you should be careful with the queue names. Out of the box devise-async and qc will not interact as they use different default queues. The user should either configure `Devise::Async.queue = 'default'` or tell `rake qc:work` to listen on `QUEUE=mailer`.