v10.0.9 (RC1 for 10.1.0)

Since quite a bit of code has changed, this is a beta / RC release before v10.1.0 is released. I don't expect there to be any new bugs, though.

Versions 10.0.4(s), 10.0.5(s) and 10.0.6(s) were released by other people in various forks, here's a larger version jump to 10.0.9 / 10.1.0 so we don't have conflicting plugin builds with the same version numbers.

Notable changes:

• Couple bugfixes for Calibre 4 and Calibre 6 (fixes #101 and #114)
• A bunch of bugfixes for odd PDF files (fixes #104, #183 and #233)
• Fix issues with key retrieval (fixes #109, #115, #116, #119, #134, #214)

For the full changelog, see CHANGELOG.md

SHA256 checksum of the 10.0.9 ZIP file: d46e7ff94a46dc871eb9b7e639e6da1883823cd5a9d705d53f51bd9c251aabda