CGDrawing - Initial commit
BrickBreaker- User now has multiple lives

- Detecting when game has been won, i.e. all bricks are broken.
- Renaming delegate method gameDone to loseLife so it better reflects
what it is used for.
- Adding new livesLabel to VC and every time the ball falls through the
‘floor’ (i.e. dies) then the LevelVC notifies the root VC with the
loseLife method to ensure the score board is updated.