NEW:
- #165 Scan-in-batch: searches are done asynchronously while scanning can continue.
       Book data is collected/buffered for editing after you stop scanning.
- #156 Wikidata AuthorResolver
- ISFDB login option (see the site's settings page). Needed for text-searches only.
- StripWeb site parser updates

FIXES:
- A lot of smaller issues, see #162, #167, #171, #174, #175, #176, #178, #179, #180
