Merge pull request #1383 from RonnyPfannschmidt/founding-header

give the founding header contrast

doc/en/_templates/layout.html

@@ -1,9 +1,9 @@
 {% extends "!layout.html" %}
 {% block header %}
-<div align="center" xmlns="http://www.w3.org/1999/html">
+<div align="center" xmlns="http://www.w3.org/1999/html" style="background-color: lightgreen;  padding: .5em">
   <h4>
     <a href="https://www.indiegogo.com/projects/python-testing-sprint-mid-2016#/">
-      Support the future of py.test join or fund the sprint in june
+      Support the future of py.test development: join or fund the next sprint in June in Germany
     </a>
   </h4>
 </div>