2.3.4  second template parameter of Point_set_2 has now a default value

2.3.3  other pointer access using handles

2.3.2  the Unique hash map stores now Vertex_handles
       instead of Vertex* (necessary for VC)

2.3.1  docs changed (range_search variants added)

2.3    Unique_hash_map used
       new range_search variants added (not yet documented)
       some demos added

2.2.7  some changes in the demos

2.2.5  Susan moved Point_set_2_ref directory up one level

2.2.4  Susan made changes necessary for manual split

2.2.3  chapter name changed

2.2.2  some deprecated functions removed from Point_set_2.h 
       and from manual
       small changes to examples and demos

2.2.1  manual changes
       some member functions removed from Point_set_2 class

2.2    function template versions for nearest neighbor queries and
       range searches added 

2.1.1  a shorter example program was added and is includet in the manual

2.1    manual changed
       kernel traits support improved

2.0.2  point_set_traits_2 removed (we need now only one geometric
       traits class)

2.0.1 range search example program changed
      some 'typenames' and a typedef added to Point_set_2.h  
      to please g++ with -pedantic compilation

2.0  The Point_set_2 class is now based on the CGAL Delaunay triangulation
     and needs no longer LEDA