Added some new area sprites for the mining station.
Lots of new sprites by Petethegoat.
Made sprite for the disposal delivery chute facing the other way.
Moved the mining-related sprites to their own file.
Updated the Mining Consoles, and the 3 mining production machines with new sprites.
UPDATED CHANGELOG.
git-svn-id: http://tgstation13.googlecode.com/svn/trunk@2013 316c924e-a436-60f5-8080-3fe189b3f50e