Allows more cargos to be loaded into more different cars.
Currently, it allows:
- All tanker car loads in all other tankers
- Containerized fluids and gases (e.g. CryoOxygen, Argon) in takers
- Certain flatcar loads (e.g. Boards, SteelRolls) in box cars
If you know how to use the Unity Editor and how to make prefabs, feel free to make a pull request! If I get around to it, prefabs will be needed for flatcars, gondolas, and hoppers to represet the visible cargo.