Prisons added, end game state, win/lose message added

[e-luo]

Prisons exist now:

• board has functions that will update scores when prisons are hit
• when number of prisons on one player's side is 0, game ends

During building:

• user must add at least one prison on their board.
• if other player not ready and has no prisons, a random prison will be added

Handler

• made as a parameter so we can drop runnables if necessary (i.e. user cancels done)