Method for unregistering Bonjour service on server
Style change
Method for server to stop handling connections

Also kills existing spawned greenlet connection handlers after a
timeout (1 second by default)
Call the server stop() method at exit

Should hopefully be called in all circumstances, exceptions included
Merge branch 'master' into zeroconf

Included commits:

* Method for server to stop handling connections
* Call the server stop() method at exit

Conflicts:
	netrng.py