Bone based damage system (feature vote and debate)

Anyway, both divVerent and Samual said they only want this as a mutator. I'll do it as one for now, but after it's been around for a bit I might suggest including it in the main code and defaulting it. As a mutator people can test it, and specify if they'd like this after trying it out in practice (and seeing if it changes balance in a way that affects any category of players badly).

My first thought on this whole idea was that it could work well with the Overkill mod, since it uses hitscan weapons more than explosives.