Merge pull request #8 from alexoliveira/bricks

Adjusted scene size to fit the view size.
Making the ball a physics body that's a circle.
Merge pull request #9 from alexoliveira/makingBallaCircle

Making the ball a physics body that's a circle.
Ball own object
Merge pull request #10 from alexoliveira/feature/ballObject

Ball own object
Updating the ball and walls to have no friction.
Merge pull request #11 from alexoliveira/physicsPropertiesUpdate

Updating the ball and walls to have no friction.
Added 3 rows of bricks as default brick pattern.