* samples/mini-oln/mini-oln.cc: Remove compilation
	usage in comment.
	(oln::Iterator::is_valid, oln::Image::has)
	(oln::Image2d::nrows_get, oln::Image2d::ncols_get)
	(oln::Image3d::nrows_get, oln::Image3d::ncols_get)
	(oln::Image3d::nslis_get, oln::image_base::has): Add missing
	return keywords.
	(oln::image_with_nbh::nbh): Disable method.
	* Makefile.am (SUBDIRS): Add samples.
	* samples/mini-oln/concept-c++/mini-oln.cc: Likewise.
	* samples/Makefile.am,
	* samples/mini-oln/Makefile.am,
	* samples/mini-oln/concept-c++/Makefile.am: New.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@733 4aad255d-cdde-0310-9447-f3009e2ae8c0