OneAxisEllipsoid.projectToGround(...) fails at poles
When evaluated for a point on the minor axis of the ellipse
projectToGround(Vector3D, ...) returns NaN while
projectToGround(TimeStampedPVCoordinates, ...) throw a NPE.
transform(PVCoordinates, ...) is also affected since it calls
projectToGround(...) The problem appears to be a divide by zero when trying to determine the meridian. The attached diff for the test cases shows the problem.