Allow any warp in xtract

Merge pull request #6 from SPMIC-UoN/xpy

Accept any warp fields

Bug fixes and releasing xtract_divergence

Merge pull request #5 from SPMIC-UoN/xpy

Bug fixes and add xtract_divergence

Bug fix. New plotting

xtract_qc: Squashed bug due to missing mkdir. Made plotting generalisable to any number of tracts.

Minor updates to default warp fields

Merge pull request #3 from SPMIC-UoN/xpy

update default stdwarp filenames, allowing e.g. standard2diff_warp or standard2diff as default

Move multi-template to hidden

Merge pull request #2 from SPMIC-UoN/xpy

made multi-template macaque a hidden option...

XTRACT python and multi-template macaque

Merge pull request #1 from SPMIC-UoN/xpy

XTRACT python