Merged gevent/zmq updates, ported to requests >= 1.2

 * Updated gevent/zmq libraries
 * Switched to unittest2 discovery
 * Fixed some deprecated code
 * Removed requirements.txt files, everything is in setup.py
 * Fixed test_average test being not executed
Add setup.cfg to work with nose tests
Merge pull request #87 from EnTeQuAk/locust_07

 Merged gevent/zmq updates, ported to requests >= 1.2