Improved performance of QueueDir.keys()

Removed unused class

Added a sort to the QueueDir.keys(), changed the output of bbq-ls

Improved the performance of bbq-ls

Minor updates

Major overhaul of entire project.

Added Readme

Placed all queue directories under .bbq in main queue directory to make way for user code in the root of the queue

Added bbq-cat, changed default priority to 4 and range from 1-10 to 0-9

Initial commit