REF: changed the flag for the vertebral level files from -vert to -vertfile. See issue #781.
REF: changed the flag for the vertebral level files from -vert to -vertfile. See issue #781.

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