Death Knight spell: Raise Dead

This one kind of works in the Rel19 branch, although I still have to do some work on it before it's completely functional.

I'll continue fixing the death knight spells/talents after I finish working on the Dungeon Finder as well as updating the scripts and database for 19.

You could probably compile a list of bugs a mile high in the master branch, it's in pretty bad shape atm :(