CC surface alignment + subsegment ordering#812
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This PR contains two commits.
Fixed corpus callosum surface alignment. The generated CC surfaces are now correctly mapped with the volume. This was previously not the case for the isolated visualization script. Both visualzation and main script also had a bug where an offset would be in the surface if the image size would differ after resampling to fsaverage resolution (i.e. the original image would have not the same world-size as fsaverage)
In some cases CC subsegments labels were flipped in the segmentation output. This was due to an unreliable heuristic determining anterior and posterior segments in the contour.
Both changes were tested with a testsuite of 8 cases, with multiple resolutions, orientations and challenging anatomy using visual inspection and automated testing.