OPT: added param to compute model in command line with msct_multiatlas_seg
OPT: added param to compute model in command line with msct_multiatlas_seg

3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox