* The code matches the documentation and uses the new API with property maps:
- The code uses the new API with property maps.
- The test suites work.
- The MFC and Qt demos work.
- Copied Pierre's comments in Reference Manual to C++ comments.
* Renaming:
- merge_simplify_point_set -> grid_simplify_point_set.
- read_xyz_point_set split() as read_xyz_points() + read_xyz_points_and_normals().
* Gyroviz stuff:
- merge_simplify_nearest_point_set renamed as grid_simplify_nearest_point_set and moved to Poisson demo (as it is limited to Gyroviz_point_3 points).
- The code in Point_set_processing_3 uses the new API with property maps.
Proof of concept of the new API with property maps.
* Fixed compilation error with g++ 4.3.1
* Updated mst_orient_normals() documentation
* Added property_map_multiple_streams.cpp to dont_submit
TODO: delete property_map_multiple_streams.cpp