* Added ore boxes to the gulag, and added a conveyor belt which goes outside and has a loading machine, which will take the ore from the orebox.
 * Added sprites for the stacking machine going in the reverse direction, just set the dir to 1 instead of 2.
 * Added prison intercoms which will not broadcast until someone hacks it. Added these intercoms in the gulag, the perma brig and the brig cells.
 * When a prisoner has received enough points for freedom, if they try to move the shuttle, or open the middle door, while someone is on it they will get an error message. This way there is no way for a free'd prisoner to release their fellow prisoners once they have reached their point target. The shuttle will depart right away when you call the shuttle from the stacking console, to stop prisoners from getting on while it departs.
 * Added cards to the perma brig and to the dorms.
Merge pull request #2104 from Giacom/gulag_therevenge

[MAP] The Gulag: The Revenge: Part 2.5