Merge pull request #4 from einarj/queue_list

Extracted a new WorkerQueueList class out of Rescue::Worker
Merge branch 'master' of https://github.com/einarj/resque
Added tests for Resque::WorkerQueueList
Updated tests based on the excellent feedback from @steveklabnik

* Converted to Unit syntax
* Removed test for regular constructor usage
* Swapped false checks for refute
Removed blank lines
Merge pull request #987 from einarj/WorkerQueueListTests

Worker queue list tests