* mln/accu/min.hh,
	* mln/accu/p.hh: Fix.


	New hierachy on value types in order to factorise the traits
	declarations.

				Value
				  ^
				  |
			---------------------------
			|       |        |        |
		      Scalar Vectoriel Symbolic  Structured
		        ^
			|
	             --------
                     |      |
		 Integer  Floating

	* mln/value/internal/floating.hh: New.
	* mln/value/internal/integer.hh: New.
	* mln/value/internal/scalar.hh: New.
	* mln/value/internal/structured.hh: New.
	* mln/value/internal/symbolic.hh: New.
	* mln/value/internal/value_like.hh,
	* mln/value/internal/vectoriel.hh: New.

	Update value types inheritance.

	* mln/value/float01_.hh,
	* mln/value/gray.hh,
	* mln/value/graylevel.hh,
	* mln/value/int_s.hh,
	* mln/value/int_u.hh,
	* mln/value/int_u_sat.hh,
	* mln/value/label.hh,
	* mln/value/quat.hh,
	* mln/value/rgb.hh: Update.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@1251 4aad255d-cdde-0310-9447-f3009e2ae8c0