Update README.md

README.md

@@ -1,6 +1,6 @@
 [![Stories in Ready](https://badge.waffle.io/openworm/org.geppetto.png?label=ready&title=Ready)](https://waffle.io/openworm/org.geppetto)
 <p align="center">
-  <img src="https://raw.github.com/openworm/org.geppetto.frontend/master/src/main/webapp/images/geppetto-logo@2x.png" alt="Geppetto logo"/>
+  <img src="https://dl.dropboxusercontent.com/u/7538688/geppetto%20logo.png?dl=1" alt="Geppetto logo"/>
 </p>
 
 # [Geppetto](http://www.geppetto.org/)
@@ -22,15 +22,19 @@ This is the umbrella project that keeps together all the different modules curre
    * [org.geppetto.core](https://github.com/openworm/org.geppetto.core) [![Build Status](https://travis-ci.org/openworm/org.geppetto.core.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.core)
    * [org.geppetto.simulation](https://github.com/openworm/org.geppetto.simulation) [![Build Status](https://travis-ci.org/openworm/org.geppetto.simulation.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.simulation)
    * [org.geppetto.frontend](https://github.com/openworm/org.geppetto.frontend) [![Build Status](https://travis-ci.org/openworm/org.geppetto.frontend.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.frontend)
+ * Optional
+    * [org.geppetto.persistence](https://github.com/openworm/org.geppetto.persistence) [![Build Status](https://travis-ci.org/openworm/org.geppetto.persistence.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.persistence)
  * Domain Specific
    * Neuronal simulation
      * [org.geppetto.model.neuroml](https://github.com/openworm/org.geppetto.model.neuroml) [![Build Status](https://travis-ci.org/openworm/org.geppetto.model.neuroml.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.model.neuroml)
      * [org.geppetto.simulator.jlems](https://github.com/openworm/org.geppetto.simulator.jlems) [![Build Status](https://travis-ci.org/openworm/org.geppetto.simulator.jlems.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.simulator.jlems)
+     * [org.geppetto.simulator.external](https://github.com/openworm/org.geppetto.simulator.external) [![Build Status](https://travis-ci.org/openworm/org.geppetto.simulator.external.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.simulator.external)
    * Fluid mechanics simulation
      * [org.geppetto.model.sph](https://github.com/openworm/org.geppetto.model.sph) [![Build Status](https://travis-ci.org/openworm/org.geppetto.model.sph.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.model.sph)
      * [org.geppetto.solver.sph](https://github.com/openworm/org.geppetto.solver.sph) [![Build Status](https://travis-ci.org/openworm/org.geppetto.solver.sph.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.solver.sph)
      * [org.geppetto.simulator.sph](https://github.com/openworm/org.geppetto.simulator.sph) [![Build Status](https://travis-ci.org/openworm/org.geppetto.simulator.sph.png?branch=master)](https://travis-ci.org/openworm/org.geppetto.simulator.sph)
 
+
 Geppetto is an open-source project with a growing community, if you want to contribute (with either new simulators support, visualisation widgets or backend magic) please do get in touch at <[email protected]> or fork any of the bundles and do what you please.