Added code to allow removal of all factoids associated with a given key.
Added code to allow removal of all factoids associated with a given key.

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