f discovery major bugs fixed
f minor fixes
r minor naming fixes
r minor naming fixes
+ discovery agent migrated from dealer-router to push-sink
r naming fixed
r naming
r still naming
Merge branch 'master' of github.com:cordis/pycloudia

Conflicts:
	pycloudia/devices/discovery/agent.py
	pycloudia/devices/discovery/protocol.py
	pycloudia/devices/discovery/udp.py
	pycloudia/sockets/__init__.py
	pycloudia/sockets/zmq_impl/factory.py
	pycloudia/sockets/zmq_impl/messages.py
	pycloudia/sockets/zmq_impl/sockets.py
	pycloudia/sockets/zmq_impl/strategies.py