new Group(game, parent, name, addToStage, enableBody, physicsBodyType)
A Group is a container for display objects including Sprites and Images. Groups form the logical tree structure of the display/scene graph where local transformations are applied to children.For instance, all children are also moved/rotated/scaled when the group is moved/rotated/scaled. In addition, Groups provides support for fast pooling and object recycling. Groups are also display objects and can be nested as children