Update README.md

Author: sauterl

README.md

@@ -1,5 +1,10 @@
 # DresUnityInterface
 
+---
+** ATTENTION **
+** The unity interface points to version 1.3 of DRES, which is behind the current version v2.0.0-RC1""
+---
+
 An interface for [DRES](https://github.com/dres-dev/DRES), meant to be used in [Unity](https://unity.com/).
 
 ## Usage / Installation