removed autoinstall of libzmq

fixes issue #25
updated README as per #24

Added mentions of:
*  collectstatic for production django server
*  apt-get install build-essentials before running setup.py
*  zmq not installed with apt before running setup.py
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
updated collector scripts to always provide auth tuple

also updated README and manifest for new Vagrant box
updated Vagrantfile for new box
updated README with further instructions
updated README to correct default http creds.

These are set in the /var/www/.htpasswd file and need to be set
in COLLECTOR_AUTH in the localsettings.py
Merge pull request #27 from kkleidal/issues24_25

Fixes Issues #24 and #25
Merge pull request #33 from kkleidal/issue19_2

ZMQ Flow Change to Allow for Multiple Django Workers
Merge #35 from @kkleidal
adds catch for when we get a string instead of an expected numeric value