Update Buffs.txt

This is JUST a cleaned up version made for Warlords of Draenor.  All references to Mists of Pandaria or Cataclysm have been removed.  All domain=wod's have been removed.  And finally, I'm trying out removing all [br]'s at the top of each Buff tab section just to see how it looks.

My next push should be the actual update with all the new stuff, but I wanted to have this as a step to fall back on just in case I somehow horribly mess it up.