Fix the base class used in newplugin.
Fix the base class used in newplugin.

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