Release of Version 4.0.0

This version is a major refactoring of former release, version 3.0.1. It contains a lot of deprecations, but also adds a brand new API for retrieving secured links. Beside of that, several bugs were fixed and the documentation is finally up to date. The old, parameter-based, link generation (?eID=secure_downloads&...) has been removed and all links are now secured with a JSON Web Token. However, old links are still callable when upgrading to this version.

Please take a look at the change log to get more information about this release.