Update abstract::pset hierarchy to final SCOOP-2 design.
	
	* oln/core/pset_entry.hh: New.
	* oln/core/typedefs.hh: Include oln/core/abstract/entry.hh.
	* oln/core/abstract/bbox.hh: Clean includes.
	(set_super_type): Change from abstract::pset<E> to pset_entry<E>.
	(bbox): Update.
	* oln/core/abstract/entry.hh (set_super_type): New specialization.
	* oln/core/abstract/pset.hh (Copyright): Fix years.
	(vtypes, ext_vtype): Remove.
	(fixed_pset, ra_pset, bboxed_pset): Move and dispatch to...
	* oln/core/abstract/pset_fixed.hh: ...this new file.
	* oln/core/abstract/pset_ra.hh: ...this new file.
	* oln/core/abstract/pset_bboxed.hh: ...this new file.
	* oln/core/abstract/pset.hh
	(pset_fixed_hierarchy, pset_ra_hierarchy, pset_bboxed_hierarchy)
	(case_): Move to...
	* oln/core/abstract/pset_hierarchies.hh: ...this new file.



git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@524 4aad255d-cdde-0310-9447-f3009e2ae8c0