Added new argument to save the database in nicely formatted json.
Syncing epubs is now monothreaded, to prevent simultaneous directory creations by separate threads.
Empty collections no longer ignored by default, because it led to multiple collections oof the same name when updating an already existing empty collection.
LibrarianSync can now download and automatically update collections when librarian is serving ebooks.
Minor corrections.
Minor corrections.
Minor corrections for import & ordering results.
Reading progress is now automatically exported as a collection when syncing with a Kindle.
Updated READMEs with the new --serve/download commands.
Updated main README.