Split Human Marks and Segmentations

[birm]

make segmentation collection, add to store as relevant, add to distro, trade out, test Also involves adding a segmentation metadata collection involves a migrations script which:

• creates and indexes the new collection
• moves segmentations to the new collection
• creates segmentation metadata collection based on existing segmentations

other decisions?

[birm]

work on a topic branch. requires a change to the segmentation loader system, make that issue or change after.