Merge branch 'master' of github.com:tgstation/-tg-station
Merge branch 'NTSL_Fix' of git://github.com/Giacomand/-tg-station
Merge branch 'master' of github.com:tgstation/-tg-station
Fixes a typo in the dirty floor MC setup. \ref -> \red.
Makes /obj/effect/decal/cleanable/dirt mouse_opacity 0, as it covers the whole tile and prevents people from crowbarring it up.
It can still be cleaned by mopping the tile.
Standardises dirtystation.dm, and vastly reduces the chances for 'interesting' dirt, such as blood and vomit. Blood in particular is much rarer.
Makes virology always clean.
Merge pull request #91 from Petethegoat/master

Update to dirty floors.