* oln/core/abstract/image/hierarchies.hh
	(image_hierarchy_wrt_value_wise_accessibility): New hierarchy.
	(image_hybrid_hierarchy_wrt_classical)
	(image_hierarchy_wrt_value, image_hierarchy_wrt_data_retrieval):
	Adjust numbers.
	* oln/core/abstract/image/all.hh
	(oln/core/abstract/image/value_wise_accessibility/hierarchy.hh):
	Include it.
	Adjust.
	* oln/core/abstract/image/value_wise_accessibility/hierarchy.hh: New.
	* oln/core/automatic/image/image_being_value_wise_random_accessible.hh:
	New.
	* oln/core/internal/fwd_viter_lut.hh,
	* oln/core/gen/fwd_viter_lut.hh: New.
	* oln/core/typedefs.hh (fwd_viter_type, mutable_fwd_viter_type)
	(lut_type, lut_iter_type): New virtual types declarations.
	* oln/core/lookup_table.hh (lookup_table): Rename the first two
	parameters to Orig_Value and New_Value.
	Add two parameters Orig_Value_Compare and New_Value_Compare,
	defaulting to std::less<Orig_Value> and std::less<New_Value>
	respectively.
	(lookup_table::key_type, lookup_table::data_type): Rename typedefs
	as...
	(lookup_table::orig_value_type, lookup_table::new_value_type):
	...these.
	(lookup_table::map_type): Remove typedef.
	(lookup_table::orig_value_type, lookup_table::new_value_type)
	(lookup_table::const_iterator, lookup_table::iterator): New
	typedefs.
	Adjust signatures of methods.
	(lookup_table::map): Remove method.
	(lookup_table::begin, lookup_table::end, lookup_table::find)
	(lookup_table::orig_to_new_map, lookup_table::new_to_orig_map):
	New methods.
	(lookup_table::map_): Remove attributes.
	(lookup_table::orig_to_new_map_, lookup_table::new_to_orig_map_):
	New attributes.
	(lookup_table::add): Adjust method.
	* oln/morpher/with_lut.hh: Adjust.
	(single_vtype<morpher::with_lut<Image, Lut>, typedef_::fwd_viter_type>)
	(single_vtype<morpher::with_lut<Image ,Lut>,
	 typedef_::mutable_fwd_viter_type>):
	New.
	(with_lut::lut_t, with_lut::value_t, with_lut::rvalue_t)
	(with_lut::psite_t): Rename typedefs as...
	(with_lut::lut_type, with_lut::value_type, with_lut::rvalue_type)
	(with_lut::psite_type):	...these.
	Adjust.
	(with_lut::fwd_viter_type, with_lut::mutable_fwd_viter_type):
	New typedefs.
	(with_lut::impl_value): New methods.
	(operator+ (const abstract::image<I>&, const lookup_table<K, D>&)):
	Turn into...
	(operator+ (const abstract::image<I>&, lookup_table<K, D>&)):
	...this.
	Adjust.
	* tests/morphers/with_lut.cc: Augment this test.

	* oln/value/color/rgb.hh
	(rgb_<T>::operator==(const rgb_<U>&)): New operator.
	* TODO: New.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@685 4aad255d-cdde-0310-9447-f3009e2ae8c0