* mln/accu/rank.hh,
	* mln/accu/rank_bool.hh,
	* mln/accu/rank_high_quant.hh: Move to...
	* mln/accu/stat/rank.hh,
	* mln/accu/stat/rank_bool.hh,
	* mln/accu/stat/rank_high_quant.hh:
	Move rank accus to stat directory.

	* mln/accu/all.hh,
	* mln/accu/essential.hh,
	* mln/accu/stat/all.hh,
	* mln/accu/stat/essential.hh:
	Update all and essential respecting new locations.

	* tests/accu/rank.cc,
	* tests/accu/stat/rank.cc:
	Move tests in stat directory.

	* tests/accu/Makefile.am,
	* tests/accu/stat/Makefile.am:
	Update makefiles.

	* mln/morpho/includes.hh,
	* mln/morpho/rank_filter.hh,
	* mln/morpho/tree/compute_attribute_image.hh,
	* sandbox/theo/tufa_2008/filter_n.cc:
	Replace accu::accu_name by accu::stat::accu_name,
		accu::meta::accu_name by accu::meta::stat::accu_name,
		accu/accu_name by accu/stat/accu_name.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@4152 4aad255d-cdde-0310-9447-f3009e2ae8c0