add rectangle list to bullet class
add for loop to check rectangle collision in bullet
add collideWith method for rectangles
fix method names
add function to add rectangles to bullet
add method to check rectangle collisions
fix Bullet.collidesWithRect
Move rectmode to rectangle render method
call player.addRectangles for collision
Merge branch 'feature/roof' of github.com:natemara/space-invaders-processing into feature/roof