add udp network class
Merge branch 'master' into udp_connection
Merge branch 'master' into udp_connection
Merge branch 'master' into udp_connection
udp connection
Merge branch 'master' into udp_connection

Conflicts:
	pytrak.py
	trakstar/trakstar_interface.py
resolve merge conflicts
importing library if dll not installed
importing library if dll not installed: bugfix
update udp connection