This was originally forked from [calibreserver](https://bitbucket.org/raphaelmutschler/calibreserver) and now includes additional features as well as many bugfixes.
Optionally, to enable on-the-fly conversion from EPUB to MOBI when using the send-to-kindle feature:
1. Create a `vendor` folder in the app root
2. [Download](http://www.amazon.com/gp/feature.html?docId=1000765211) Amazon's KindleGen tool for your platform and place the binary named as `kindlegen` in this folder.