ICP, an open-source implementation of the iteratively closest point library.
      
     ROS wrapper for the implementation of the 
     Iteratively Closest Point algorithm, originally
     implemented by Per Bergstrom, released under BSD.
     It uses a kd-Tree library, originally 
     implemented by Guy Shechter, released under BSD.
      
     http://www.mathworks.com/matlabcentral/fileexchange/16766
      
     http://www.mathworks.com/matlabcentral/fileexchange/4586-k-d-tree
     
icp is ...