geometry.index example: type-erased iterator defined in rtree used in benchmark_experimental.

git-svn-id: http://svn.boost.org/svn/boost/trunk@84100 b8fc166d-592f-0410-95f2-cb63ce0dd405
Added timeout support code from Brammert Ottens

git-svn-id: http://svn.boost.org/svn/boost/trunk@84102 b8fc166d-592f-0410-95f2-cb63ce0dd405
geometry.index test: invalid include removed from one test.

git-svn-id: http://svn.boost.org/svn/boost/trunk@84103 b8fc166d-592f-0410-95f2-cb63ce0dd405