DEV: trying to replace ants with antsRegistration for affine-- still need work
DEV: trying to replace ants with antsRegistration for affine-- still need work

3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox