Added in the Ball object albeit with no movement.

 - Added in control to the player boards. They can now move up and
down, albeit with no interaction with the ball.

 - Added in a new way of drawing the player's boards. This is now done
via the fillRect() method in the Graphics2D class contained in the
native Java library, saves time and resources trying to load images
into memory.

 - Added two kinds of control, Player 1 control and Player 2 control.
Player 1 is controlled via the W and S keys, whilst Player 2 is
controlled witht the Up and Down arrow keys.