Added bestuptime command.
Added bestuptime command.

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