add setup instructions in readme

README.md

@@ -11,6 +11,11 @@ This repository is intended for technically inclined teachers who use Renku and/
 We showcase the potential of Renku + Gitlab through a few scripts covering common use-cases.
 These scripts can be used as-provided, but are also meant to be extended and adapted by teachers for their specific needs.
 
+## Setup
+
+The repository is setup as a local python package.
+You can install it with: `pip install -e .`
+
 ## Content
 
 The following tasks are covered: