Added limit commands.
Added limit commands.

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