port to new 0.3 image header and command-line parsing interface
port to new 0.3 image header and command-line parsing interface

MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3