added placeholder victory/defeat screen

Signed-off-by: sabot <sabot@inuits.eu>
added gamestates to game object for victory and defeat screens

Signed-off-by: sabot <sabot@inuits.eu>
added classes for victory and defeat screens

Signed-off-by: sabot <sabot@inuits.eu>
added placeholder graphics for drawscreen

Signed-off-by: sabot <sabot@inuits.eu>
adding functions to remove scored balls and increment player scores (w.i.p)

Signed-off-by: sabot <sabot@inuits.eu>
added (empty) function to remove scored balls

Signed-off-by: sabot <sabot@inuits.eu>
added function to remove scored balls from the playing field

Signed-off-by: sabot <sabot@inuits.eu>