Update README.md

README.md

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-# usefullshells
+# Usefull shells
-Usefull shell scripts for daily use. 
+
+This repository contains usefull shell scripts for daily use.
+
+## Prerequisites
+
+These scripts are written for Linux based machines, to be used in a UNIX-Shell (like `bash`).
+
+## Authors
+
+* **Maximilian Stiefel** - *Graduate student at Upsala University, Sweden*
+* **Hannes Bohnengel** - *Graduate student at Technical University of Munich, Germany*
+
+## Remarks
+
+This `README.md` grows with the project and will be updated during work.