- Create the landmark as normal, but instead of allocating a z-level and placing it, register a pre_move listener on the shuttle and setup the z-level only when the shuttle is about to move to its overmap landmark.
- Change when shuttles fire the shuttle_pre_move_event to before calculating translation list to give us a chance to allocate the z-level.
- Ports the overmap, ships, sectors, and "landable" ships from baystation.
- Ports necessary computers to control ships and overmap shuttles.
- Shims missing machine and computer functionality pending future enhancements.
- Includes required new sprites and sounds.
