Changed the chat command prefix to ! and made it slightly easier to track down (should really be more configurable though).
Changed the chat command prefix to ! and made it slightly easier to track down (should really be more configurable though).

Conflicts:
	samples/Common/IrcBot.cs

Chaek/IrcDotNet,tripwires/IrcDotNet,tripwires/IrcDotNet,alexreg/IrcDotNet,Chaek/IrcDotNet