Making the Early Game Easier for Vampires

[Embolism]

Vampires got a pretty huge buff that for some reason wasn't in the Changelogs (or maybe I'm blind). I'd say they're probably comparable to Changelings now in the threat they pose.

On the other hand, there should probably be a limit to how much blood you can drink from a single target. It didn't matter that much before when Vampires were weak, but now it is not hard to get lots of blood (especially with the greatly increased drinking speed) by draining a monkey-human supported by a Medibot.