Complete RTP pub/sub subsystem (stable API now). General code cleanup.
Fixed some code for msvc.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	CMakeLists.txt
	apps/tools/umundo-rtp-sub.cpp
	core/src/umundo/connection/rtp/RTPPublisher.cpp
	core/src/umundo/connection/rtp/RTPSubscriber.cpp
	core/src/umundo/connection/rtp/RTPSubscriber.h
	core/src/umundo/connection/zeromq/ZeroMQNode.cpp
Some minor changes
Merge pull request #6 from tmolitor-stud-tu/master

Some minor changes