Two-state vampires now in trunk

There's no one commit that has all the details, so the pertinent info as far as I can tell:

• Vampires are either Alive or Bloodless. All states between the two have been removed.
• Blood drinking and blood potions are gone - vampires are now entirely foodless (but can still drink)
• Switching states is done via the abilities Exsanguinate and Revivify. Each takes 5 turns. Revivify has a cost of a temporary -10% HP penalty (but see below).
• Bloodless vampires have a -20% HP penalty. They can now regenerate, but slowly and cannot regenerate in sight of monsters.
• Bat Form now has a cost of a few points of stat drain

Overall, looks interesting, but I'd have to play it. When I finish my current vampire, might be time to download trunk and check it out.