Start cleaning the histogram-related test.
	
	* tests/histo_compute.cc: Rename as...
	* tests/histo/compute.cc: ...this.
	Activate the test with int_s<5>.
	* tests/accu_all.cc: Inactivate tests on
	"median< value::set<bool> >" and
	"min_h< value::set<bool> >" since traits for bool are not
	equiped with min() and max().
	* tests/Makefile.am (SUBDIRS): Sort,
	Add histo.
	(histo_compute_SOURCES): Remove.
	* tests/io_pbm.cc: Simplify.
	* tests/histo/Makefile.am (check_PROGRAMS): New.
	(compute_SOURCES, TESTS): New.

	Preparing to get rid of former property mechanism for value types.
	
	* mln/value/props.hh (mln_card_): Move...
	* mln/trait/value_.hh: ...here and rename as...
	(mln_card): ...this.
	* mln/value/props.hh
	(mln_value_sum, mln_value_kind, mln_value_card_): Remove.
	(mln_is_lowq): Remove.
	(mln_min, mln_max): Move...
	* mln/trait/value_.hh: ...here.
	* mln/trait/value_.hh (mln_trait_value_card): Rename as...
	(mln_card): ...this.
	(mln_value_quant_from_card): Rename as...
	(mln_value_quant_from_): ...this.
	(mln_value_card_from_): New macro.
	(mln_nbits, mln_epsilon): New.
	* mln/trait/value/nature.hh (matrix): New.

	Now get rid of value "props".
	
	* mln/value/props.hh: Remove.
	(convert_): Move into...
	* mln/value/internal/convert.hh: ...this new file.
	(convert_<bool>): New specialization.

	Propagate changes.
	
	* tests/value_bool.cc,
	* mln/trait/images.hh,
	* mln/trait/value/print.hh,
	* mln/core/macros.hh,
	* mln/math/round_sat.hh,
	* mln/metal/mat.hh,
	* mln/metal/vec.hh,
	* mln/arith/revert.hh,
	* mln/arith/revert.spe.hh,
	* mln/level/sort_points.hh,
	* mln/level/transform.spe.hh,
	* mln/level/transform.hh,
	* mln/level/stretch.hh,
	* mln/accu/min.hh,
	* mln/accu/max.hh,
	* mln/accu/min_max.hh,
	* mln/accu/sum.hh,
	* mln/value/proxy.hh,
	* mln/value/graylevel.hh,
	* mln/value/lut_vec.hh,
	* mln/value/ops.hh,
	* mln/value/gray.hh,
	* mln/value/float01_.hh,
	* mln/value/all.hh,
	* mln/value/quat.hh,
	* mln/value/int_s.hh,
	* mln/value/int_u.hh,
	* mln/value/int_u_sat.hh,
	* mln/value/set.hh,
	* mln/value/float01.hh,
	* mln/value/builtin/symbolics.hh,
	* mln/value/builtin/floatings.hh,
	* mln/value/builtin/integers.hh,
	* mln/value/rgb.hh,
	* mln/value/float01_f.hh,
	* mln/value/label.hh,
	* mln/fun/v2v/saturate.hh,
	* mln/morpho/Rd.hh,
	* mln/norm/l1.hh,
	* mln/norm/l2.hh: Update.

	Misc.

	* mln/metal/math/pow.hh (mlc_pow, mlc_pow_int): New macros.
	* mln/value/internal/iterable_set.hh: .
	* mln/io/pnm/save_header.hh (save_max_val): New specialization
	for bool.
	* mln/io/pnm/load.hh: Fix.
	* mln/io/pbm/save.hh: Fix.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@1512 4aad255d-cdde-0310-9447-f3009e2ae8c0