NEW: added new function to change a cubic label shape into a discrete label by recovering the coordinates of the center of mass
NEW: added new function to change a cubic label shape into a discrete label by recovering the coordinates of the center of mass

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