REF: added available parameters to sct_propseg
REF: added available parameters to sct_propseg

Former-commit-id: 62743301d252772f552afc418411fb0a2be30f37 [formerly 1c496176baab0230374b649cb7fb31b5e46f9cd0]
Former-commit-id: bf9efd942abf8090c8793d078b3d6e0ed77661d5
Former-commit-id: 57b7aefe18b03439367627a34a2c9e85a0f8c04e
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox