* headers.mk: update distributed file list.

	* mln/make/dummy_p_edges.hh,
	* mln/make/dummy_p_vertices.hh,
	* mln/util/line_graph.hh,
	* mln/util/internal/graph_base.hh,
	* mln/util/internal/graph_iter.hh,
	* mln/util/internal/graph_iter_base.hh,
	* mln/util/internal/graph_nbh_iter.hh,
	* mln/util/internal/graph_nbh_iter_base.hh,
	* mln/util/graph.hh,
	* mln/morpho/attribute/count_adjacent_vertices.hh,
	* mln/core/concept/graph.hh: update member signatures with vertex and
	edge ids.

	* mln/core/site_set/p_graph_piter.hh,
	* mln/core/internal/graph_psite_base.hh,
	* mln/core/internal/neighb_niter_impl.hh,
	* mln/core/internal/graph_psite_base.hh,
	* mln/core/image/graph_window_piter.hh: comment a conversion
	operators. Cause ambiguities with iterators/proxies.

	* mln/core/image/vertex_image.hh,
	* mln/core/image/edge_image.hh: add new members.

	* mln/core/internal/site_iterator_base.hh: add a 'target' typedef.

	* mln/core/site_set/p_edges.hh,
	* mln/core/site_set/p_vertices.hh: add new constructors.

	* mln/make/rag_and_labeled_wsl.hh: update doc.

	* mln/util/graph_ids.hh,
	* mln/util/edge.hh,
	* mln/util/vertex.hh: introduce vertex and edge id types.

	* mln/util/internal/id2element.hh: function mapping ids to graph
	elements.

	* mln/make/p_edges_with_mass_centers.hh: fix guards.

	* tests/make/dummy_p_vertices.cc,
	* tests/morpho/graph_image_morpho.cc,
	* tests/morpho/graph_image_wst.cc,
	* tests/morpho/line_graph_image_morpho.cc,
	* tests/morpho/line_graph_image_wst.cc,
	* tests/util/graph.cc,
	* tests/util/line_graph.cc: update tests according the new
	routines/constructors/types.

	* mln/core/concept/object_id.hh: new concept for object ids.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3712 4aad255d-cdde-0310-9447-f3009e2ae8c0