NEW: wrapper of ComposeMultiTransform to concatenate warping fields
NEW: wrapper of ComposeMultiTransform to concatenate warping fields

Former-commit-id: c9d1d26b8813c0382a9059fd5d571c8b14ff9f6f
Former-commit-id: 13263d49a22296932e5eadb21af766bf83e6665b
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox