- Reduced metroid sight range from 12 to 7.
- Reduced metroid target hunting range from 30 to 7.
- Removed unnecessary loops and checks.
- I didn't do much with AIprocess() but it could really use some more work.
Cleaned out unnecessary checks from porta_turret process() and reduced the range from 12 to 7.
Removed handle_virus_updates from brains, metroids and aliens since there are no viruses that affect them.
git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4174 316c924e-a436-60f5-8080-3fe189b3f50e