Gutenberg2kindle

Fixed

- Solve a possible memory leak when sending multiple books by manually closing each book's buffer after an email has been sent.

Added

- You can now download more than one book in the same run instead of running the CLI several times; the `--book-id` flag now supports several IDs as input.

Changed

- CLI flags now have a short version that can be seen with `--help`
- CLI will now request the user's SMTP password _before_ downloading the first book, and re-use the same password in case multiple book downloads were requested.

Added

- Support to set the desired ebook format to be downloaded from Gutenberg: Kindle with Images, Kindle without Images, or Auto.

Changed

- The default format for ebooks is "Auto": the tool will attempt to download the book in Project Gutenberg's "Kindle with Images" format, and if not available, will fallback to "Kindle without Images".

Initial release!

Added

- The tool can be set up
- The tool can download a book from Project Gutenberg's website, given its ID, and send it through email.