Update README.md

README.md

@@ -3,7 +3,7 @@ Status
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 [![pipeline status](https://gitext.gfz-potsdam.de/gts2/gts2_client/badges/master/pipeline.svg)](https://gitext.gfz-potsdam.de/gts2/gts2_client/commits/master)
 [![coverage report](https://gitext.gfz-potsdam.de/gts2/gts2_client/badges/master/coverage.svg)](https://gitext.gfz-potsdam.de/gts2/gts2_client/commits/master)
-
+[![AUR](https://img.shields.io/aur/license/yaourt.svg)](https://gitext.gfz-potsdam.de/gts2/gts2_client/blob/master/LICENCE)
 [Coverage report](http://gts2.gitext.gfz-potsdam.de/gts2_client/coverage/)
 
 ## Release notes