Partial revert of LatLonPointRadius to its state before we made it a GeneralDirectPosition subclass.
I wrongly interpreted 'radius' as the radius from Earth center, while it was the radius around the
circle center. Note that this class may be refactored as a geometric object in a future SIS version.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1579030 13f79535-47bb-0310-9956-ffa450edef68