Release v0.16.0

KOReader Plugin

Download crossbill.koplugin.zip and extract it to your KOReader plugins directory.

Readers already running the plugin can install this from the device:
Crossbill → Check for Updates → Install.

crossbill.koplugin.zip.sig is the Ed25519 signature the plugin
checks before installing anything. It is of no use when installing
by hand.

What's Changed

• Create a book with a single EPUB upload by @Tumetsu in #55

Full Changelog: v0.15.1...v0.16.0