Implemented passthrough for ZMQ communication

between Django and Flask.  Currently, this passthrough
runs as a separate process, but the plan is to integrate
it with the Flask app as a gevent task.
integrated zmq passthrough with gevent

the passthrough can now be spawned from the flask process
enabled multiple django workers in supervisor config file for django
Merge pull request #33 from kkleidal/issue19_2

ZMQ Flow Change to Allow for Multiple Django Workers