OPT: added landmarks based translation registration
OPT: added landmarks based translation registration

Former-commit-id: dff1077c2cefc4c9f08de23c7bb6fb6044e4d7b7
Former-commit-id: 5cefbba041220f66b9e682fb108b610a4e54a0f1
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox