Added recipe for Kavita (swarm)

So you've just watched a bunch of superhero movies, and you're suddenly inspired to deep-dive into the weird world of comic books? You're already rocking AutoPirate with Mylar and NZBGet to grab content, but how to manage and enjoy your growing collection?

Kavita Reader is a "rocket fueled self-hosted digital library which supports a vast array of file formats". Primarily used for cosuming Manga (but quite capable of managing ebooks too), Kavita's killer feature is an OPDS server for integration with other mobile apps such as Chunky on iPad, and the ability to save your reading position across multiple devices.