Wolves may no longer kill the traitor.

A relatively simple change, wolves can no longer `kill <traitor>`. It's an optional change and I'm not confident in how I feel about this, but considering some people are silly, this change is probably for the better.

I've tested it and it seems to work fine.

Opinions?

(Sorry this took three commits; I accidentally commited my other change to this branch, and I don't know how to rewrite history yet.)