* milena/doc/tutorial/figures/tuto4_genericity_and_algorithms-10.ppm
	* milena/doc/tutorial/figures/tuto4_genericity_and_algorithms-7.pgm
	* milena/doc/tutorial/figures/tuto4_genericity_and_algorithms-7.ppm
	* milena/doc/tutorial/figures/tuto4_genericity_and_algorithms-8.pgm
	* milena/doc/tutorial/figures/tuto4_genericity_and_algorithms-8.ppm
	* milena/doc/tutorial/figures/tuto4_genericity_and_algorithms-9.pgm
	* milena/doc/tutorial/figures/tuto4_genericity_and_algorithms-9.ppm:
	new reference files.

	* milena/doc/tutorial/samples/tuto4_genericity_and_algorithms.cc:
	uncomment code using extract::* routines.

	* milena/doc/tutorial/tutorial.tex: include code and images related to
	extract::* routines. More explanations need to be written.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3193 4aad255d-cdde-0310-9447-f3009e2ae8c0