* doc/tutorial/figures/tuto3_rw_image-1.ppm,
	* doc/tutorial/figures/tuto3_rw_image-2.ppm,
	* doc/tutorial/figures/tuto3_rw_image-3.ppm,
	* doc/tutorial/figures/tuto4_genericity_and_algorithms-1.ppm,
	* doc/tutorial/figures/tuto4_genericity_and_algorithms-2.ppm,
	* doc/tutorial/figures/tuto4_genericity_and_algorithms-4.ppm,
	* doc/tutorial/figures/tuto4_genericity_and_algorithms-5.ppm,
	* doc/tutorial/figures/tuto4_genericity_and_algorithms-6.ppm,
	* doc/tutorial/figures/tuto4_genericity_and_algorithms-7.pgm,
	* doc/tutorial/figures/tuto4_genericity_and_algorithms-8.ppm,
	* doc/tutorial/figures/tuto4_genericity_and_algorithms-9.ppm: update.

	* doc/tutorial/figures/tuto4_genericity_and_algorithms-10.ppm: delete,
	not needed anymore.

	* doc/tutorial/samples/tuto3_rw_image.cc,
	* doc/tutorial/samples/tuto4_genericity_and_algorithms.cc: Use rgb8
	instead of rgb16.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3200 4aad255d-cdde-0310-9447-f3009e2ae8c0