Fixes reader button visible in detail view
Fix formats to convert (added htmlz)
Fix logger in updater
Added request "v3" of github api on update
Fix quotes parameter on external calls
E-Mail logger working more stable (also on python3)
Routing fixes
Change import in ub
Improved user guidance for Google Drive
Improved Errorhandling for Google Drive
Update french translation
Added ukranian translation
Improvements on updater: calibre-web.log1, calibre-web.log2, gdrive_credentials, settings.yaml, gdrive.db, .git are no longer deleted upon update
