create new directories under ./src/sisudoc ocda & outputs in order to
separate the document abstraction library from downstream output
processing (stuff broken till paths & modules fixed)

- revisit links (fix later)

- preferable, endnote parent object number
  available for use (as here in text output,
  compare "endnotes, add caller ocn" commit)

- spine --text [--output=output path] [markup source]

- src/sisudoc (replaces src/doc_reform)
- sisudoc spine (used more)