Libraries using MFHD-based serials would like the ability to assign a default OU at import time, rather than having to manually edit all of the files after to change "\N" to the ID of the owning library.

1. We need to teach the exporter how to export the MFHD records that exist for a given bibliographic record.
1. We need to teach the exporter how to generate MFHD records that represent the holdings for a given bibliographic record.
1. We need to expose these options in the Vandelay interface.