STYLE: Remove unnecessary CLUSTER tag from config file

The config file had an unnecessary CLUSTER tag that had no functional capabilities. Removed from parsing.
ENH: Update to include SEM generated interfaces.

This is needed to include changes made to BRAINSABC
ENH: Add initial masking to Averaged images

By masking the average images, we can limit the variance of the non
brain regions to a smaller set of values for estimations.
ENH: Fixed niype SEM generation bug

A patch was submitted to NIPYPE to permanently fix this, but
for now a manual fix has been put into place.
ENH: Fix BRAINSABC for AutoWorkup.

Added a manual ants based segmentation prior to BRAINSABC.