preparing for initial import

* --initial-import working (not finished yet)

* author names cleaned up, die when encounter
unknown author name (should be added to authors_canonical)

* remove excessive quotes around item titles during import

* populate tsv_struct for storage item when reading incoming csv

* new custom fields:
  - sdm-archive-workflow.misc.completeness
  - sdm-archive-workflow.misc.authenticity
  - sdm-archive-workflow.misc.document-type

* --dump-storage-item "1 113" -- dumps internal item structure
by storage_group_id and storage_number (debugging)