Beefed up Mind Transfer. Can now swap with traitors/revs/etc. Limited to humans and monkeys, and may not transfer to changelings, wizards, or cultists. Targets must still have a mind and a client for this to work (must also be alive).
Mind Transfer now correctly works for mime targets or other targets with special verbs.
Added a proper spell book for wizards.
Changelings are now properly assigned their special role at round start.
git-svn-id: http://tgstation13.googlecode.com/svn/trunk@810 316c924e-a436-60f5-8080-3fe189b3f50e