Add bboxes and iterators.
	
	* oln/core/abstract/piter.hh: New.
	* oln/core/abstract/bbox.hh: New.
	* oln/core/abstract/iter.hh: New.
	* oln/core/abstract/pset.hh: New.
	* oln/core/2d/aliases.hh: New.
	* oln/core/gen/fwd_piter.hh: New.
	* oln/core/gen/bkd_piter.hh: New.
	* oln/core/gen/bbox.hh: New.
	* oln/core/2d/point2d.hh (point2d_): New ctor.
	(point2d, dpoint2d, point2df, dpoint2df): Move typedefs to...
	* oln/basics2d.hh: ...this new file.
	* oln/core/typedefs.hh (oln_type_of_): New macro.
	(include): Update.
	(fwd_piter_type, bkd_piter_type): New decls.
	* oln/core/abstract/point.hh (include): Update.
	(vtypes_): New specialization.
	* oln/core/abstract/dpoint.hh: Likewise.
	* oln/core/abstract/point_nd.hh (include): Update.
	(set_super_type): New specialization.
	* oln/core/abstract/dpoint_nd.hh: Likewise.



git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@513 4aad255d-cdde-0310-9447-f3009e2ae8c0