* oln/core/concept/image.hh (Gray_Level_Image, Color_Image)
	(Label_Image, Binary_Image, String_Image)
	(Deformation_Field_Image, Data_Image): New.
	* oln/core/internal/max_value.hh: Fix.
	* oln/core/internal/image_selectors.hh (Image_value_kind): New. 
	* oln/morpho/dilation.hh: Fix.
	* oln/morpho/elementary_erosion.hh (elementary_erosion_): Rename as...
	(elementary_erosion_on_function_): ...this.
	(elementary_erosion_on_set_): New.
	(elementary_erosion_): Dispatch over function/set.
	(elementary_erosion): Update.
	* oln/level/local.hh (A): Rename as...
	(F): ...this.
	* oln/accumulator/max.hh,
	* oln/core/internal/min_value.hh,
	* oln/morpho/elementary_dilation.hh: New.
	* oln/value/greylevel.hh: Rename as...
	* oln/value/graylevel.hh: ...this.
	(greylevel_, greylevel): Rename as...
	(graylevel_, graylevel): ...these.
	* oln/value/default.hh (greylevel): Rename as...
	(graylevel): ...this.
	* oln/value/all.hh (include): Update.
	* oln/value/bin.hh (bin): Change from greylevel_<1> to
	graylevel_<1>.
	* oln/value/tags.hh (is_grey_level): Rename as...
	(is_gray_level): ...this.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@892 4aad255d-cdde-0310-9447-f3009e2ae8c0