NEW: msct_image : crop_from_mask, from any kind of mask without changing the space of the image
NEW: msct_image : crop_from_mask, from any kind of mask without changing the space of the image

Former-commit-id: 392e2e659dd4dcf253247348938cbdecc48733b2
Former-commit-id: fe9dd6e1fdfc84172e0fa3fe7eff6bb210c791b3
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox