* oln/core/1d/image1d.hh, oln/core/1d/array1d.hh,
	* oln/core/1d/point1d.hh, oln/core/1d/dpoint1d.hh,
	* oln/core/1d/neighb1d.hh, oln/core/1d/aliases.hh,
	* oln/basics1d.hh: New.
	* oln/core/abstract/point_set_being_connected.hh
	(oln::abstract::point_set_being_1d_connected): New class.
	(oln::case_<point_set_hierarchy_wrt_connectivity, E, 1>): Handle
	the 1-dimension case, and move the 2-dimension case...
	(oln::case_<point_set_hierarchy_wrt_connectivity, E, 2>): ...here
	(new).
	* tests/image1d.cc: New test.
	* tests/Makefile.am (check_PROGRAMS): Add image1d.
	(image1d_SOURCES): New.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@604 4aad255d-cdde-0310-9447-f3009e2ae8c0