NEW:
- #149: click on an author name to open the author-works screen
- #153: filters for authors names

FIXES:
- Amazon parsing updated
- #146: 2nd fix: it's again possible to use "Copy if blank" on list-fields.
- #153: don't overwrite author picture when updating
- #154: refresh author when coming back to the author-works screen
- #155: Backup was missing the author identifiers. Updating an author was not updating its
  metadata.
- #159: CSV import: ratings/prices with a comma dec. sep. failed to import.
