* Makefile.am,
	* tests/img/test_bw.tif,
	* tests/img/test_gl.tif,
	* tests/img/test_rgb8.tif: add new test images.

	* headers.mk: update list of distributed files.

	* mln/value/rgb.hh,
	* mln/convert/from_to.hxx: add from_to overload from rgb8 to bool.

	* mln/io/magick/load.hh: update doc.

	* mln/io/tiff/load.hh: Fix loading of rgb files.

	* tests/data.hh.in: add a new macro for test images directory.

	* tests/io/Makefile.am,
	* tests/io/tiff/Makefile.am,
	* tests/io/tiff/load.cc: new test for io::tiff::load.

	* tests/unit_test/unit-tests.mk: update unit test list.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3657 4aad255d-cdde-0310-9447-f3009e2ae8c0