Add some abstract image sub-hierarchies.
	
	* oln/automatic/image_being_mutable.hh: New.
	* oln/core/abstract/image/mutability/hierarchy.hh: New.
	* oln/core/abstract/image/accessibility/hierarchy.hh: New.
	* oln/core/abstract/image/bbox/hierarchy.hh: New.
	* oln/core/typedefs.hh (lvalue_type, is_mutable_type): New.
	* oln/core/macros.hh (oln_deduce_type_of): New.
	* oln/core/abstract/image.hh: Cosmetics.
	* oln/core/abstract/image/hierarchies.hh
	(image_hierarchy_wrt_bbox): New.
	(image_hierarchy_wrt_accessibility): New.
	(image_hierarchy_wrt_mutability): New.
	(include): Update.	
	* oln/core/abstract/image/neighborhood/hierarchy.hh (decl): New.
	(~image_having_neighborhood): New.



git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@574 4aad255d-cdde-0310-9447-f3009e2ae8c0