Rewrite README.

README.md

-# BiscuIT School Information System (SIS) - App Chronos
-
-## BiscuIT
-
-This is an application for use with the [BiscuIT-ng platform][BiscuIT-ng].
-
-## Features
-
-The Chronos app provides functionality for digital timetables.
-
-
-[BiscuIT-ng]: https://edugit.org/Teckids/BiscuIT/BiscuIT-ng

README.rst

+BiscuIT School Information System (SIS) - App Chronos (digital timetables)
+======================================================================
+
+BiscuIT
+-------
+
+This is an application for use with the `BiscuIT-ng`_ platform.
+
+Features
+--------
+
+The Chronos app provides functionality for digital timetables.
+
+Licence
+-------
+
+::
+
+  Copyright © 2019 Dominik George <dominik.george@teckids.org>
+  Copyright © 2019 mirabilos <thorsten.glaser@teckids.org>
+  Copyright © 2019 Tom Teichler <tom.teichler@teckids.org>
+
+  Licenced under the EUPL
+
+Please see the LICENCE file accompanying this distribution for the
+full licence text or on the `Europen Union Public Licence`_ website
+(including all other official language versions).
+
+.. _BiscuIT-ng: https://edugit.org/BiscuIT/BiscuIT-ng