Add pipeline badges for use in Github

README.md

 The Task Parallel System Composer (TaPaSCo)
 ===========================================
-<img src="icon/tapasco_icon.png" alt="Tapasco logo"/>
+![Tapasco logo](icon/tapasco_icon.png)
+
+Master Branch Status: [![pipeline status](https://git.esa.informatik.tu-darmstadt.de/tapasco/tapasco/badges/master/pipeline.svg)](https://git.esa.informatik.tu-darmstadt.de/tapasco/tapasco/commits/master)
+Dev Branch Status: [![pipeline status](https://git.esa.informatik.tu-darmstadt.de/tapasco/tapasco/badges/2018.2/pipeline.svg)](https://git.esa.informatik.tu-darmstadt.de/tapasco/tapasco/commits/2018.2)
 
 System Requirements
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