OPT: register_to_template: shows affine transfo results if v=2
OPT: register_to_template: shows affine transfo results if v=2

Former-commit-id: 10c5c8721eda59ae3ab5a9092a99e189f58bad07 [formerly cf222159f53323d1a1d3c6dd2bee58f948b7a8ef]
Former-commit-id: d413e5e9808fafc17aa5c4ed9b8ace7cdca39d42
Former-commit-id: 8d2a700bd09338eb8273e820a95e3fdd1eb5fcf0
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox