The unit that Represents an Air Transport
Default statistics are: health - 150, armor - 90, firepower - 0, movement range - 6, type - "Air Transport"
Special Ability: the ability to carry up to 2 soldiers, 1 super soldier, 1 tank and 1 missle launcher
Finishes off the attack process involving dealing out damage, determining money earned by attacking player,
whether or not the enemy or attacker dies during the process.
Constructor - parameters are: width, height, player 1, player 2, the game to associate with,
the players' cash panel, the purchase panel and the map board