* mln/data/memcpy_.hh: Deactivate trace.
	This internal routine floods the trace file because it can
	be called in a loop.
	* mln/linear/gaussian.hh (class): Replace by...
	(typename): ...this.
	See sandbox/theo/exec/ for a fastest implementation.
	* mln/accu/transform_line.hh (transform_line_fastest): New.
	* mln/morpho/rank_filter.hh (rank_filter_line): New.
	(rank_filter_dispatch): New overload for rectangle2d.
	* mln/morpho/includes.hh: Update.
	* img/BUG_lean_ascii.pgm.gz: New.
	This file makes io::pgm::load bug.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3554 4aad255d-cdde-0310-9447-f3009e2ae8c0