NEW: introducing vertebral alignement into sct_register_to_template
NEW: introducing vertebral alignement into sct_register_to_template

Former-commit-id: 5befe52931512c6afc6bf229d6489ab00a48e791
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox