Re-enabled __slots__ and added __getstate__, __setstate__
Re-enabled __slots__ and added __getstate__, __setstate__

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