New files.

	* mln/core/internal/point_iterator_base.hh: New.
	* mln/core/internal/point_set_base.hh: New.
	* mln/core/concept/mesh.hh: New.
	* mln/core/concept/regular_grid.hh: New.
	* mln/core/grids.hh: New.

	Update to take into account the notion of mesh.
	
	* doc/Doxyfile.in,
	* mln/pw/image.hh,
	* mln/core/dpoint1d.hh,
	* mln/core/dpoint2d.hh,
	* mln/core/dpoints_piter.hh,
	* mln/core/dpoint3d.hh,
	* mln/core/macros.hh,
	* mln/core/box.hh,
	* mln/core/point.hh,
	* mln/core/internal/piter_adaptor.hh,
	* mln/core/internal/run_pset.hh,
	* mln/core/internal/run_psite.hh,
	* mln/core/internal/image_base.hh,
	* mln/core/point1d.hh,
	* mln/core/point2d.hh,
	* mln/core/point3d.hh,
	* mln/core/line_piter.hh,
	* mln/core/vec_p_piter.hh,
	* mln/core/line2d.hh,
	* mln/core/box_piter.hh,
	* mln/core/cast_image.hh,
	* mln/core/queue_p.hh,
	* mln/core/pset_if.hh,
	* mln/core/vec_p.hh,
	* mln/core/concept/image.hh,
	* mln/core/concept/dpoint.hh,
	* mln/core/concept/point_iterator.hh,
	* mln/core/concept/generalized_point.hh,
	* mln/core/concept/point_set.hh,
	* mln/core/concept/object.hh,
	* mln/core/dpoint.hh,
	* mln/core/set_p.hh,
	* mln/metal/is_a.hh: Update.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@1123 4aad255d-cdde-0310-9447-f3009e2ae8c0