Support basic management of the Worker pool.
Support Que::Worker.wake! and .wake_all!
Add a wrangler thread, to poke a Worker every 5 seconds (or other configurable length of time).
Rearrange things a bit.
Rename Que::Worker#asleep? to #sleeping? to be more consistent with #working?
Scrap specs for a feature that's too hard to support in ActiveRecord, so not bothering for now.
Minor spec cleanup.
Rescue any errors the set_error statement may raise, just to be safe.
Stray line that should have been deleted.
Minor SQL cleanup.
Add a rake task for benchmarking Que in comparison to DelayedJob and QueueClassic.