OPT: updated pipeline with straightening
OPT: updated pipeline with straightening

Former-commit-id: 57879f1b9aed530acfcaab79f01eece0c5278477 [formerly fc77ad1c7621ed88b0d67f4ad7896cc5d344fed9]
Former-commit-id: 0063b998e4cc0ac0148ce3b6b8eef0449b170afa
Former-commit-id: 6c75beb2ddc36a608d9d807014aad49dfed50aab
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox