[RIS] Treat authors for EDBOOK as editors in Zotero on import
Re https://forums.zotero.org/discussion/35455/endnote-import-how-to-map-label-to-library-catalog/
[RIS] Allow translators to override field mappings
Re https://github.com/zotero/translators/pull/698#discussion-diff-10737178
[RIS] Import Series (title?) for journal articles from T3
Re https://forums.zotero.org/discussion/35592/journal-series-omitted-in-jstor-import/
Merge pull request #702 from aurimasv/RIS-misc

Some RIS changes