Added IrcCommandDispatcher as base class for IrcCallback and IrcState.
Added IrcCommandDispatcher as base class for IrcCallback and IrcState.

Ban3/Limnoria,haxwithaxe/supybot,ProgVal/Limnoria-test,ProgVal/Limnoria-test,buildbot/supybot,frumiousbandersnatch/supybot-code,prashantpawar/supybot-rothbot,mazaclub/mazabot-core,Ban3/Limnoria,kblin/supybot-gsoc,jeffmahoney/supybot,mazaclub/mazabot-core,raboof/supybot