Refactors prison jumpsuit slightly to not be a child of the orange jumpsuit, which in turn gets its own sprite. Left/right hand uniforms don't seem to be applying in-game when carrying the suits but that's not too bad of an issue. Uniform on the mob shows properly and works with sleeves rolled and uniform rolled down.
Links many map-specific details such as the station name, z-level information, and allowed jobs from global vars to map datum vars, which should help us maintain multiple maps at once in the future, which will be needed for the future Southern Cross.
Note that a config change will be needed to change GENERATE_ASTEROID to GENERATE_MAP, otherwise no changes should be required to continue normal map usage.
To change to a different map, it's suggested to tick the file that ticks all the other needed files, which for the Northern Star is called northern_star.dm.
