* doc/Doxyfile.in: add doc/tutorial/img to IMAGE_PATH.

	* doc/doc.mk: Set the path to doc/tutorial/img in a variable.

	* doc/tutorial/Makefile.am: Add IMG_SRCDIR to to TEXINPUTS.

	* img/small-enlarged.png,
	* img/small.png: move...
	* doc/tutorial/img/small-enlarged.png,
	* doc/tutorial/img/small.png: ... here.

	* doc/tutorial/samples/accu-wrong-instanciation.cc.raw: use a
	different accumulator.

	* doc/tutorial/tools/sample_utils.hh: do not include all io headers.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3430 4aad255d-cdde-0310-9447-f3009e2ae8c0