* scribo/binarization/internal/first_pass_functor.hh,
	* scribo/binarization/local_threshold.hh,
	* scribo/binarization/sauvola.hh,
	* scribo/binarization/sauvola_ms.hh,
	* scribo/binarization/sauvola_ms_split.hh,
	* scribo/binarization/sauvola_threshold_image.hh,
	* scribo/canvas/integral_browsing.hh: Add more parameters to
	Sauvola routines.

	* scribo/binarization/sauvola_threshold_image_debug.hh: New. New
	overload providing debug outputs.

	* scribo/debug/usage.hh: Remove a parameter.

	* scribo/src/binarization/Makefile.am,
	* scribo/src/binarization/pgm_global_threshold_auto.cc,
	* scribo/src/binarization/pgm_sauvola.cc,
	* scribo/src/binarization/pgm_sauvola_ms.cc,
	* scribo/src/binarization/ppm_fg_sauvola_ms.cc,
	* scribo/src/binarization/ppm_sauvola.cc,
	* scribo/src/binarization/ppm_sauvola_ms.cc,
	* scribo/src/binarization/ppm_sauvola_ms_split.cc: Add new
          program arguments.

	* scribo/src/binarization/fg_sauvola_ms.cc,
        * scribo/src/binarization/sauvola.cc,
        * scribo/src/binarization/sauvola_ms.cc,
        * scribo/src/binarization/sauvola_ms_split.cc,
	* scribo/src/binarization/sauvola_debug.cc: New.