Add Pyro4 transport

Use a Pyro proxy as channel.  Published object must implement methods
used in the Channel class for the shared_queues object. Once published
this object can be shared across multiple hosts.

Sample object backing:
https://github.com/tahmmee/pyroqueue/blob/master/pyroqueues.py
Merge branch 'tahmmee/master'
cosmetics
Pyro cosmetics (Re #228)
Adds Tommie McAfee to AUTHORS