[ ] Networking messages for buying ships and ships being spawned.
[ ] Selecting ships in the GUI.
[ ] Buying ships in the GUI.
[ ] Visualizing what ship has been selected.
Optional:
[ ] Extra balancing work.
[ ] Ability to buy different kinds of ships.
[ ] Differ what ships are being offered and for what prices. Maybe, reduce the ship prices every turn until a player buys it. Maybe have players bid for them, etc.
Optional: