Job timeouts
If the watchdog finds a timedout job, have it check again immediately for more to work through a potential backlog of timed out tasks
If an error occurs when updating a timed out job, keep the watchdog going
Remove watchdog
Job prioritization support
Add test for minPriority worker
Merge branch 'priority' of git://github.com/blackboard/monq into development

* 'priority' of git://github.com/blackboard/monq:
  Add test for minPriority worker
  Job prioritization support