- removed the EXIT_JOB from ThreadPool. it's not req'd now that the queue has been simplified - now preventing busy-waiting when the ThreadPool is empty by using a threading.Condition.
- removed the EXIT_JOB from ThreadPool. it's not req'd now that the queue has been simplified
- now preventing busy-waiting when the ThreadPool is empty by using a threading.Condition.

lewissbaker/cake,lewissbaker/cake,lewissbaker/cake,lewissbaker/cake