Adding license info and source code link

theme/templates/base.html

@@ -211,7 +211,7 @@ j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
         {% endif %}
     </div>
     <div class="row footer-info">
-    <small>This site is built using  <a href="http://getpelican.com/" >Pelican</a>.</small>
+    <small>This site is built using  <a href="http://getpelican.com/" >Pelican</a>: <a href="https://gitlri.lri.fr/pons/website" >Source code</a>. All content is under <a href="http://creativecommons.org/licenses/by/4.0/" >Creative Commons Attribution 4.0 International License</a>. Banner picture is from <a href="http://ecco2016.combinatoria.co/" >ECCO 2016</a> from Federico Ardilla.</small>
     </div>
     </div>
 </footer><!-- /#contentinfo -->