* mln/core/w_window.hh (win): Update sig.
	(clear): New.
	(from_to): New overload.
	* mln/core/internal/site_relative_iterator_base.hh: Update.
	* mln/core/neighb.hh: Update.
	* mln/core/concept/proxy.hh (from_to): New overload.
	* mln/core/concept/weighted_window.hh (sym): Update.
	* mln/core/concept/gpoint.hh (from_to): New overload.
	* mln/convert/to.hh: Decouple from convert::from_to so...
	(include from_to.hh): Replace by...
	(include from_to.hxx): ...this.
	Update includes.
	* mln/convert/to_image.hh: Fix temporary; O can be *-able.
	* mln/geom/bbox.hh: Likewise.
	* mln/convert/to_w_window.hh: Remove; obsolete because replaced by
	from_to.
	* mln/convert/from_to.hh: Fix ambiguities in multiple guards; keep
	only one.
	* mln/convert/all.hh,
	* tests/core/alias/w_window1d_int.cc,
	* tests/core/alias/w_window2d_int.cc,
	* tests/core/alias/w_window3d_int.cc: Update.
	* mln/convert/from_to.hxx: New.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/branches/cleanup-2008@2389 4aad255d-cdde-0310-9447-f3009e2ae8c0