* edwin/exec/benchmark/Makefile,
	* edwin/exec/benchmark/newv.cc,
	* edwin/exec/benchmark/oldv.cc,
	* edwin/exec/benchmark:
	Applications, and comparaisons between the old and new
	version.

	* edwin/mln/core,
	* edwin/mln/core/concept/dindex_site.hh,
	* edwin/mln/core/concept/index_site.hh,
	* edwin/mln/core/dindex_site.hh,
	* edwin/mln/core/internal/index_site_base.hh,
	* edwin/mln/core/internal,
	* edwin/mln/core/site_set/p_run_idx.hh,
	* edwin/mln/core/site_set/p_run_idx_piter.hh,
	* edwin/mln/core/site_set:
	Temporary type for index site (used by the node type), its
	site set and its iterators.

	* edwin/mln/core/concept/tree.hh,
	* edwin/mln/core/concept:
	Tree concept.

	* edwin/mln/core/image,
	* edwin/mln/core/image/attribute_image.hh:
	Attribute image type.

	* edwin/mln/debug,
	* edwin/mln/debug/ctree.hh:
	Debug tools with println overloads.

	* edwin/mln/morpho/tree/component_tree.hh: Shortcuts for
	building min and max tree.

	* edwin/mln/morpho/tree/compute_attribute_image.hh: Compute an
        attribute using the new tree representation.

	* edwin/mln/morpho/tree/impl,
	* edwin/mln/morpho/tree/impl/union_find.hh:
	(Simple) tree computation based on union-find method.

	* edwin/mln/morpho/tree/propagate_node.hh:
	Temporary methods for fast propagation. Will be useless as
	soon as the subdomain morpher will be specialized.

	* edwin/mln/util,
	* edwin/mln/util/ctree,
	* edwin/mln/util/ctree/ctree.hh,
	* edwin/mln/util/ctree/internal,
	* edwin/mln/util/ctree/internal/tree_base.hh,
	* edwin/mln/util/ctree/node.hh:
	Materials for the new tree representation.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@4620 4aad255d-cdde-0310-9447-f3009e2ae8c0