reintroduced html tag stripping in IRCConnection.py from older commits.

Thanks grindhold for indirectly reminding me of the importance of a html stripper.
closes #6 bot no longer disconnects in empathy when a user is kicked
thanks SwedFTP for this Hint.
Look at comment in MumbleConnection.py Line 187-196 for details.
pulled upstream fix
Add IRC Nick Authentication via PASS