You probably won't notice this, but it makes things slightly easier for atmos techs.
Several instances of ReplaceWithFloor changed to ReplaceWithPlating- the floor tiles under walls were annoying me. RCDs now create plating instead of floor also.
git-svn-id: http://tgstation13.googlecode.com/svn/trunk@2786 316c924e-a436-60f5-8080-3fe189b3f50e