[Olena-patches] 4349: Test more accurately the histo1d class in image processing chain. Try to isolate the background color of mp000082c_50p.pgm. * green/histo1d/Makefile.am : Update minor settings in Makefile. * green/histo1d/histo1d.hh : New C++ type. * green/histo1d/gaussian.sh : New GNUPLOT script to calibrate gaussian filter. * green/histo1d/save_sh.hh (save_sh) : Update some GNUPLOT style. * green/histo1d/histo1d.cc (test_classify) : New function. * green/histo1d/mp00082c_50p.pgm : New test scribo ima