* tests/t_image.cc: New.
	* tests/stack.cc: New.
	* tests/approx_median.cc: New.
	* mln/core/t_image.hh: New.
	* mln/value/stack.hh: New.
	* tests/median.cc: Update.
	* tests/README: Update.
	* mln/core/internal/image_base.hh
	(morpher_lvalue_): New.
	* mln/core/internal/image_adaptor.hh: Use morpher_lvalue_.
	(image_adaptor_): Change Image<I> into I.
	* mln/core/safe.hh: Update.
	* mln/core/image2d_b.hh: Remove dead code.
	* mln/metal/vec.hh: Split decls and defs.
	(operator<<): New.
	* mln/level/median.hh (hline2d): Update.
	(vline2d): New.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@1042 4aad255d-cdde-0310-9447-f3009e2ae8c0