Feature requests rmcrackan#229 , rmcrackan#148 : Bulk actions on filt…

…ered books

bug fix: db persistence shouldn't be a side effect. the client should…

… say when to persist in some fairly explicit way

New feature: auto-library updating

increment version

Don't allow multiple simultaneous imports

Extract 'sortable' formatting from GridEntry

update dependencies

Bug fix rmcrackan#234 : chapters were no longer included in the m4b file

New feature: metadata correction in converted output files

New feature: metadata correction in converted output files