Center thanks banner logos

Author: marvinm2

_includes/thanks.html

@@ -1,5 +1,6 @@
-<p style="margin-left: 15px;">With generous support from: <br/>
-  <div style="background-color:#FFFFFF; margin-left: 15px;">
+<div style="text-align: center;">
+  <p>With generous support from:</p>
+  <div style="background-color:#FFFFFF; display: inline-block;">
   <a href="http://www.maastrichtuniversity.nl/" target="_blank"><img height="25px" src="/assets/img/um.png" alt="Maastricht University"/></a>
   <a href="https://gladstone.org/" target="_blank"><img height="25px" src="/assets/img/gladstone.png" alt="Gladstone"/></a>
   <a href="http://code.google.com/soc" target="_blank"><img height="35px" src="/assets/img/gsoc.png" alt="Google Summer of Code"/></a>
@@ -10,5 +11,5 @@
   <a href="http://www.openphacts.org/" target="_blank"><img height="25px" src="/assets/img/openphacts.jpeg" alt="OpenPHACTS"/></a>
   <a href="https://www.zonmw.nl/en/" target="_blank"><img height="25px" src="/assets/img/zonmw.png" alt="ZonMw"/></a>
   <a href="https://aws.amazon.com/blogs/opensource/aws-promotional-credits-open-source-projects/" target="_blank"><img height="30px" src="/assets/img/aws.jpg" alt="AWS"/></a>
-  </div> 
-</p>
+  </div>
+</div>