NEW: add orientation options in sct_image
NEW: add orientation options in sct_image

Former-commit-id: 5c80c7dbf0e4101e148fdaa1834a1754f963929e [formerly 70582f6b894858ba1dd66e8103ccac5b6ab1e2fc]
Former-commit-id: 3ddb6d013f7ebb528d5fe0e5e000fa26485c33b5
Former-commit-id: 53283750dff6a8e972b286d550b6e9a43eb63cbe
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox