Added logo image
+<p align="center">
+ <img src="https://user-images.githubusercontent.com/45048351/89231067-3ddbc580-d5ed-11ea-9639-2838059dda2c.jpg">
+</p>
+
<br/>
<p align="center">
<a href="https://github.com/fasten-project/fasten/actions" alt="GitHub Workflow Status">
