* headers.mk: add mln/io/cloud/all.hh.

	* tests/unit_test/Makefile.am,
	* tests/unit_test/mln_io_cloud_all.cc: add missing unit test.

	* mln/accu/rms.hh,
	* mln/convert/impl/from_image_to_site_set.hh,
	* mln/core/alias/all.hh,
	* mln/fun/p2p/translation.hh,
	* mln/trace/exiting.hh,
	* mln/transform/internal/closest_point_functor.hh: add missing
	includes.

	* mln/debug/slices_2d.hh: remove an unused variable.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3250 4aad255d-cdde-0310-9447-f3009e2ae8c0