Add OpenHub and Core Infrastructure Initiative widget on home page

index.html

@@ -46,6 +46,9 @@ layout: home_orekit
     anybody can use it to build any application, free or not. There are no
     strings attached to user code.</p>
 
+    <p><a href="https://bestpractices.coreinfrastructure.org/projects/2726"><img src="https://bestpractices.coreinfrastructure.org/projects/2726/badge"></a></p>
+    <p><script type='text/javascript' src='https://www.openhub.net/p/orekit/widgets/project_factoids_stats?format=js'></script></p>
+
   </div>
 
   <div class="col-sm-12 col-md-6 col-lg-4 col-xl-4">