Hivemind Communication (:g) must be purchased before use

- A new Hivemind Communication power is required to be purchased before the changeling can use the changeling channel (:g)
- Changelings without the Communication power can still faintly sense if other changelings are speaking through hivemind, but not who or what they are saying.

Remove changeling kill-teams. Add paranoia and ling vs ling conflict.
m-muh codebabby ;_;

anyway, be mindful of the fact that hivecheck is often overridden with a simple "return 0".