Update and rename Buffs and Debuffs.txt to Buffs.txt

There still isn't updated pet buff data out yet for Versatility and Multistrike, but the class buffs for those have been updated, so I figured to push this out now.  I also just want to see how it looks and make sure I didn't screw anything up.  I didn't touch any of the Mists stuff, so nothing should be weird there at least.

About removing the Debuffs section, I am serious about that.  Mortal Wounds just isn't relevant enough in PVE to justify having an entire table for it.  If you disagree, we could compromise by just tagging it on the end of the Buffs tabs.  Otherwise, I have a fully updated copy that also keeps the Debuffs table.

Also, without debuffs, we might as well remove the Buffs table header name and... maybe the picture too, but I like it.

"Buffs.txt" is pretty dry, but I'm not sure of a better name.  WoD Buffs?  Warlords Buffs?  PVE Buffs?