Ninja Physics AABB constructor.
The Physics Body is linked to a single Sprite.
The Physics Body is linked to a single Sprite. All physics operations should be performed against the body rather than the Sprite itself. For example you can set the velocity, bounce values etc all on the Body.
http://phaser.io/docs/2.6.2/Phaser.Physics.Ninja.Body.html
Ninja Physics AABB constructor. Note: This class could be massively optimised and reduced in size. I leave that challenge up to you.