* tests/median.cc: Clean up.
	* tests/hmedian.cc: New.
	* tests/erosion.cc: Clean up.
	* tests/rectangle2d.cc: Update.
	* mln/core/hline2d.hh: New.
	* mln/core/rectangle2d.hh
	(half_width_, half_height_): Change to...
	(width_, height_): ...these.
	Update.
	* mln/core/vline2d.hh: New.
	* mln/morpho/erosion.hh (erosion_wrt_win): New overload.
	* mln/level/was.median.hh: New.
	* mln/level/approx: New.
	* mln/level/approx/median.hh: New.
	* mln/level/median.hh (median_as_procedure): Move into...
	* mln/level/was.hmedian.hh: ...this new file.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@1021 4aad255d-cdde-0310-9447-f3009e2ae8c0