Added a software license and pulled back some unnecessary permissions.

Site support has been added for Audible, Overdrive, Libby, Teaching Books, ISBN.de, DNB.de, ISBNSearch, and ISBNDb. Many bugs have been squashed and there's been an overhaul of how windows are managed. You should see a lot fewer issues when using multiple windows and switching between tabs.

What's Changed
- Add libro.fm extractor
- Use browser locale for date formatting
- Fetch and join multiple <p> tags from kobo description
- Account for international Audible release dates

NEW:
- Kobo support
- Improved Amazon page recognition.
- Better handling of unsupported pages (with option to report issue)
- Permission fixes
- A shiny new refresh button!

Full release notes on GitHub: https://github.com/jacobtender/marian-extension/releases/tag/v1.7.0

This release moves Marian to a native side-panel, managed by the browser. This means persistence when switching tabs.

You can replace the data with that of any supported page. Invoking Marian on unsupported pages will not replace data.

There are a handful of smaller improvements included in this release involving layout of book data and some improved fetching of GoodReads data when hidden behind a click.