Update README.md

Author: tarelli

README.md

@@ -1,7 +1,7 @@
 [![Build Status](https://travis-ci.org/openworm/org.geppetto.datasources.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.datasources)
 
-<p align="center">
-  <img src="https://dl.dropboxusercontent.com/u/7538688/geppetto%20logo.png?dl=1" alt="Geppetto logo"/>
+<p align="center">  
+  <img src="https://github.com/tarelli/bucket/blob/master/geppetto%20logo.png?raw=true" alt="Geppetto logo"/>
 </p>
 
 # Geppetto Data Sources bundle