OPT: parser updated from branch bdl_greymatterseg
OPT: parser updated from branch bdl_greymatterseg

Former-commit-id: ff4691253b4b3e2e207b43950102b1c8ac5f635f [formerly fcb05e1c77033aa062097b9a16c44299ca4c0db3]
Former-commit-id: 449fbcbe9d02af1fd8eed2434c26d1dd89bc3357
Former-commit-id: 58f59e0250be1ea75c21d8dc0e89c351170a02a8
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox