Spaceship layout

[dougli1sqrd]

There needs to be a way of describing the way a ship is laid out. There will be different levels (decks) and each level should have some kind of layout. Likely, we'll just start with a rectangular grid of small squares, where each square could represent floor or wall or such. The floor and walls should not be directly made out of ShipParts, but should be their own classes which contain ShipParts. The floor and walls are abstractions on top of the physical Floor and Wall ship parts.