Refactor the code

[lanthony159]

There are instances of duplicated code within TicTacToe.java, RunGame.java and GameGUI.java. For example, the classes RockListener, PaperListener, and ScissorsListener within GameGUI.java have duplicate code within each actionPerformed method. Refactor the code to remove duplicated lines of code.

~estimated 200 (but more points may be earned for large amounts of refactoring)