remove game over from todo file
add some comments to Roof
change Roof.setRectangles to private
add more comments to Roof
fix line-length issue in Roof.setRectangles()
add comment to Bullet.update
fix whitespace
add comment to Invader.reset
add comments to Invader
add comments to Rectangle
add comments to InvaderBlock
add comments to Player
change Player.die to Player.kill
change comments in Roof.setRectangles
Merge branch 'feature/cleanup' into develop
Merge branch 'develop' of github.com:natemara/space-invaders-processing into develop