Allow useage of VehicleWheel outside of Scenegraph context

nside the VehicleWheel class from bullet, there is a worldRotation and a worldLocation field.

These are used to apply the transformation to the Spatial of the wheel.
When using the Physicengine directly, eg via a ES, there however is no need for a spatial. It would be nice to add the following two getters to VehicleWheel

public void getWheelWorldRotation(final Quaternion store) {

public void getWheelWorldLocation(final Vector3f store) {
These are as save as possible, since they cannot modify the values of the Wheel, and would allow the useage of the phyicsvehicle outside of a pure jme scenegraph context.

I hope this is the right part of the forum for this :slight_smile: