Fixed instantiation where a new MouseListener was used to each tile - now only one is used for all Tiles.
Fixed issue where the MouseListener was being added to each tile twice.
Renamed Player implementations and changed Player to interface, with the goal of using abstraction to make the human and computer interactions with the game identical for ease of simulation.
While not as clean as using ChangeListener, it completely decouples the Model and View aspects,
and also avoids the need to manually paint() a hierarchy of components (a task best handled by Swing/AWT).
