Added additional help for supybot.log.level.
Added additional help for supybot.log.level.

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