* doc/tutorial/Makefile.am: fix wrong include path.

	* mln/canvas/morpho/algebraic_union_find.hh: add missing
	MLN_INCLUDE_ONLY guards.

	* mln/core/clock_neighb.hh: add missing is_valid().

	* mln/labeling/mean_values.hh,
	* mln/fun/v2v/rgb_to_hsl.hh: add missing includes.

	* mln/fun/x2x/rotation.hh: add more comments.

	* mln/io/dump/load.hh: check if the loaded image is valid.

	* mln/labeling/level.hh: Fix warnings.

	* mln/registration/all.hh: update comments.

	* mln/registration/icp2.hh: rename as...
	* mln/registration/icp.hh: ... this.

	* mln/registration/registration.hh: fix wrong call to
	registration_tests.

	* mln/util/graph.hh: add NDEBUG guards.

	* mln/value/rgb.hh: add missing forward declaration.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3390 4aad255d-cdde-0310-9447-f3009e2ae8c0