Add Ships

[matthew-parlette]

One type of ship should be added to the game, with more coming down the road. The ship should be implemented with a base class with general functions that will be applied to all ships for expandability.

Ship attributes:

• hull armor points
• cargo holds
• passenger rooms
• crew rooms

[matthew-parlette]

I decided to make this as simple as possible, so for now it will only be the ship name and number of holds, we'll add more features in future builds.