OPT: better alignment of vertebrae for template creation
OPT: better alignment of vertebrae for template creation

Former-commit-id: 9db2c075a23bcfbeaee62541f3049ef3eb4b5616 [formerly 92d9ec88273cca6d9a9b461319f8edf25855cc60]
Former-commit-id: b75d0ba16238241de7ecb81aa019d3e2da44d373
Former-commit-id: 90bbbd6347f35ccd8712c55b133077aa5d9816c1
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox