Simplify the XNAT data sink.
Make a SHA-1 digest directory name for long parameterizations.
Remove unused line.
The ANTS 1.9 affine map is Affine.mat.
use_histogram_matching can be a Bool which applies to all transforms. The default is True.
Add postfix file name input option.
 Update the shape and slice dimension after a meta extension update.
Remove unused line.
Merge branch 'sha_digest_dirname'
Remove stale comment.
Merge branch 'sha_digest_dirname'
Merge branch 'ants_affine_map'
Merge master.
Forego iterable param merge if there are no iterables.
Merge branch 'extraneous_cmdline'

Conflicts:
	examples/smri_ants_registration.py
Merge branch 'resampling_postfix'
Merge branch 'xnat'
Merge branch 'empty_iterables'
Merge branch 'histogram_matching'
Disable the ants Registration interface sigma_units vox value until it works in an ANTS release.