v0.0.0.72 - Hull Breach / Door Jam

Have now got damage working on the station hull and doors. If damage becomes severe, there is now a chance of air loss through the walls (if we are producing o2) and doors can become jammed (both opened and closed). With both these events, I now have an alarm sounding given that this is a bad state for your space station!

Just a little update, but makes it more interesting when hit by a few meteors!