Added a new folder for helper classes.
Added a generic, variable-size stack class.
Fixed missing package declaration in Stack class.
Added base and sample Action classes.
Added a changeFamePoints method to GameModel and PlayerModel.
Added Action stacks to GameModel to be used in the future.
Fixed some typos in Action.java. :P
Added GameState enum to GameModel (might need to be moved later).
Added a GameState field and getter to GameModel.
Added an initializeReplayMode method to GameModel.
Added redo functionality to Actions.
Added replayMove method to GameModel.

The Model component of ReplayMode is now theoretically finished.
Added a Deck class.
Added size field and getter to stack class.
Initialized actionHistory and actionReplays stacks in GameModel constructor.
made shared components. java