geometry.index: info and test visitors + functions moved to detail::rtree::utilities. Added detail::rtree::utilities::view<>. Definition of BOOST_GEOMETRY_INDEX_DETAIL_ENABLE_DEBUG_INTERFACE no longer needed.

svn path=/trunk/boost/geometry/; revision=84661
geometry.index example, test: Tests and example modified to use moved utilities.

svn path=/trunk/libs/geometry/; revision=84662