* mln/subsampling: New.
	* mln/subsampling/subsampling.hh: New.
	* mln/subsampling/gaussian_subsampling.hh: gaussian blur + subsampling.
	* mln/algebra: New.
	* mln/algebra/vec.hh: Copy of metal::vec.
	* sandbox/jardonnet/test/gaussian_subsampling.cc: New Test.
	* sandbox/jardonnet/subsampling/subsampling_2d.hh: Remove.
	* sandbox/jardonnet/subsampling/gaussian_subsampling.hh: New.
	* sandbox/jardonnet/registration: New.
	* sandbox/jardonnet/registration/icp.hh: Draft.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@1766 4aad255d-cdde-0310-9447-f3009e2ae8c0