Added config support for system width and height
Fixed mouseover/mouseout overriding touchover/touchout
Fixed game.World.removeBody() not working, when collisionGroup not set
Added support for game.System.startScene attribute
refix game.TweenGroup add method
Fixed pauseOnHide to use focus/blur
Fixed game.Animation remove, when using onComplete
Merge pull request #44 from blaspix/patch-1

Fixed game.TweenGroup.add() method
Updated Vector.angle to return the correct value.
Merge pull request #47 from codeitloadit/develop

Updated Vector.angle to return the correct value.
Added game.Vector.angleFromOrigin()
Changed pauseOnHide back to visibilityChange
Added game.RenderTexture