New features:

• Changed color of rating stars
• Reenabled m4a, m4b audio playback
• Added route to robots.txt
• Changed behavior delete books with subfolders (additional warning message, but book is deleted)
• Program info only visible in about section if user is admin
• Custom ratings of increment 0.5 are allowed
• Support multiple authors on kobo sync (not working for every Kobo Reader)
• Floating point numbers showing 2 decimals on details page
• Change settings database gdrive watch to JSON (minimum sqlite version is the 2015 released V3.9)
• Improved author names detection during for upload
• Parse Amazon_* identifiers
• Added hint for missing ghostcript on cover extraction

Bug Fixes:

• White background on transparent covers instead of black one during upload
• Fix for errors editing/uploading books with duplicate tags/authors/language names
• Fix for xx is not a valid language" on upload
• Fix get metadata, typo, if no result from google
• Fix for immediate logout with login?next="/logout"
• Stay logged in with enabled remember token, use remember token
• Guests can access public shelfs
• Hide listen button if user has no read/listen permissions
• Author name is shown again in change book order page for shelfs
• Shelf download menu is working for books with more than one format
• Text in Kobo Auth Screen is consistent now
• Reading progress for Kobo is stored correct
• Fix Kobo links for reverse proxies with subdomains
• Fix Kobo sync if one of the timestamps is outside year 1970 to 2038
• Add fix for read only GDdrive file
• First request to GDrive fails no longer
• Update error handling on callback and wording for GDrive
• Password generation for registering on python2 working again
• Calibre-web starting with installed and not activated gdrive denpendencies without internet connection again
• Catch some errors related to non writable settings db
• Handle improper migrated database with config_mature_content_tags NULL instead of ""
• Fixes for windows (moving files not allowed -> close pdf after metadata extracting)
• Reconnect is working again via web-route access
• Fix for error unrar binary not found
• Fix filenames (Escape "") for autodetect calibre excecutable on Windows
• Invalid LDAP Cert Path no longer crashes app