Store fuel on metal tank when removing from vehicle.

Fuel will be stored in a metal tank when it is removed from a vehicle.
Two things to note about this:
    * It will store as much as it can in the tank instead of figuring
      out how much it was holding before
    * The metal will be put on the players inventory so to be able to
      get a reference to it.

These two issues should be worked on in the future.