- Deprecate the "hierarchy" implementation detail in the package API.
- Introduce a Location_policy parameter instead.
- Add a "Complexity and Performance" section in the user manual.
- Add a benchmark program (dont_submit'ed for now)
Note : merge done by hand as svnmerge.py got too easily confused...
- add function .dual_support(Cell_handle, int) returning a Line_3.
- replace the requirements Plane_3, Construct_perpendicular_line_3
and Construct_plane_3 by the new Construct_equi_distant_line_3.