* headers.mk: update distributed file list.

	* mln/core/image/all.hh,
	* mln/core/image/graph_elt_neighborhood_if.hh,
	* mln/core/image/graph_elt_window_if.hh,
	* mln/core/image/graph_window_if_piter.hh: add a new
	custom window/neighborhood type for graphes.

	* mln/core/image/edge_image.hh: add missing operator().

	* mln/core/site_set/p_edges.hh,
	* mln/core/image/vertex_image.hh: update doc.

	* mln/core/internal/is_masked_impl_selector.hh: new implementation
	selector for graph_elt_window_if_piter.

	* mln/core/internal/neighb_niter_impl.hh: add support for
	graph_elt_neighborhood_if.

	* mln/core/macros.hh: add mln_graph.

	* mln/util/vertex.hh,
	* mln/core/site_set/p_graph_piter.hh: add edge_with member.

	* mln/graph/all.hh,
	* mln/graph/labeling.hh,
	* mln/graph/to_neighb.hh,
	* mln/graph/to_win.hh: new routines.

	* mln/make/edge_image.hh: add a new overload to handle p_edges with
	no sites.

	* mln/util/graph.hh: add a new edge() member.

	* mln/util/internal/graph_nbh_iter_base.hh: add element().

	* tests/core/other/Makefile.am,
	* tests/core/other/graph_elt_neighborhood_if.cc,
	* tests/core/other/graph_elt_window_if.cc,
	* tests/graph/Makefile.am,
	* tests/graph/labeling.cc,
	* tests/unit_test/unit-tests.mk: add new tests for new routines.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3751 4aad255d-cdde-0310-9447-f3009e2ae8c0