now storing a-s objects in tmp for file count considerations
adjusted registrations directory naming - one subdir for template lib, one for subjectlib/voting registrations
reorganizing output folder structures, moving ALL regsitrations to the registrations subdir
all registrations now live in the registrations subdir, new path made at output/registrations/model which holds model to atlas registrations from mb_register, as well as more simple bestlinreg xfms from models to templates and subjects
added option for pathways_dir, which will hold concatenated xfms from model/atlas to subjects
concatenated pathways now live in pathways_dir, repointed morpho references to xfms
adjusted morpho walltime settings, for quick testing