Add a temporary SCOOP equipment.

	* oln/stc/scoop.hh: New.
	* oln/stc/scoop.hxx: New.
	* oln/core/equipment.hh: New.

	Define some concepts.
	
	* oln/core/abstract/grid.hh: Rename as...
	* oln/core/concept/grid.hh: ...this and update.
	* oln/core/abstract/point.hh: Rename as...
	* oln/core/concept/point.hh: ...this and update.
	* oln/core/abstract/dpoint.hh: Rename as...
	* oln/core/concept/dpoint.hh: ...this and update.
	* oln/core/concept/operators.hh: New.
	
	Update implementation classes.

	* oln/core/2d/grid2d.hh: New.
	* oln/core/2d/dpoint2d.hh: Update.
	* oln/core/2d/point2d.hh: Update.
	* oln/core/internal/point_nd.hh: Rename as...
	* oln/core/internal/point_base.hh: ...this and update.
	* oln/core/internal/dpoint_base.hh: New.
	* oln/core/internal/dpoint2d.hh: New.
	* oln/core/internal/point2d.hh: New.

	Last.

	* oln/core/internal/tracked_ptr.hh (mlc/contract.hh): Include it.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@843 4aad255d-cdde-0310-9447-f3009e2ae8c0