Some more mapping changes.
Virology airlock should go faster now.
Xenobio now has containment doors across the entire window.
Xenobio shile dgens now require xenobio access to use.
git-svn-id: http://tgstation13.googlecode.com/svn/trunk@1834 316c924e-a436-60f5-8080-3fe189b3f50e