* mln/accu/shape/volume.hh,
	* mln/core/concept/point_site.hh,
	* mln/morpho/watershed/flooding.hh,
	* mln/topo/skeleton/breadth_first_thinning.hh,
	* mln/topo/skeleton/priority_driven_thinning.hh:
	Here.
	* tests/core/image/complex_image.cc,
	* tests/core/image/complex_image.hh,
	* tests/core/site_set/p_complex.cc,
	* tests/make/attachment.cc,
	* tests/make/detachment.cc,
	* tests/morpho/complex_image_morpho.cc,
	* tests/topo/complex.cc,
	* tests/topo/is_facet.cc,
	* apps/morphers/iz.cc:
	Replace extended characters to convert to plain ASCII.
	* mln/io/pdf/get_header.hh (mln::io::pdf::pdf_header::pdf_header):
	Generate UTF-8 metadata.
	* doc/Doxyfile.in (INPUT_ENCODING): Set to UTF-8.