Roughed out some logic for reading ATK collections/resource components.
Roughed out some logic for reading ATK collections/resource components.

artefactual/archivematica,eckardm/archivematica,sevein/archivematica,michal-ruzicka/archivematica,eckardm/archivematica,artefactual/archivematica,michal-ruzicka/archivematica,artefactual/archivematica,eckardm/archivematica,sevein/archivematica,artefactual/archivematica,michal-ruzicka/archivematica,eckardm/archivematica,sevein/archivematica,michal-ruzicka/archivematica,sevein/archivematica