Updated MetaStation.v39A.II.dmm to MetaStation.v39A.III.dmm
*Added missing air alarm to the bar.
*Updated mining and stacker machines to use new input/output vars.
*Changed tiles in hydroponics to grey from white.
*Made the toxins test site camera give off light.
*Adjusted tile colours on the main hallways slightly.
*Adjusted securitron waypoints so they no longer travel through the execution chamber.
*Fixed privacy shutter on the firing range appearing above grille.
*Fixed unnecessary reinforced table in botany.
*Other small fixes.
Merge pull request #2267 from Metacide/master

Updated MetaStation.v39A.II.dmm to MetaStation.v39A.III.dmm