use zmq.green
 - if available
 - prefer it to the deprecated gevent_zeromq
update tests to work with nose
add a setup.cfg to get automatic coverage
gardening
- remove carriage returns
- add coverage to gitignore
more link_exception noops for slaves
- noops
- server shutdown
Fix deviation calculation, test_average tests run again
Merge branch 'whitmo-gevent-update'

* whitmo-gevent-update:
  - noops - server shutdown
  more link_exception noops for slaves
  gardening - remove carriage returns - add coverage to gitignore
  add a setup.cfg to get automatic coverage
  update tests to work with nose
  use zmq.green  - if available  - prefer it to the deprecated gevent_zeromq