Added a victory screen. Since there is no current way to win, there is a 'win' button added to the top left of the game screen. Once clicked, victory text will appear and the player will be given the option to return to the main menu.
Currently hides all ship placement UI and makes visible all fire functionality. The crosshair currently does not snap to a grid. The ships are saved in an area of location objects holding the length, orientation, and coordinates of the ship.
