Add slide numbers to old presi

research-group-presi/slides.html

@@ -479,7 +479,9 @@ deleted hidden filters: 384</code></pre>
           { src: 'reveal.js/lib/js/classList.js', condition: function() { return !document.body.classList; } },
           { src: 'reveal.js/plugin/zoom-js/zoom.js', async: true },
               { src: 'reveal.js/plugin/notes/notes.js', async: true }
-        ]
+        ],
+
+        slideNumber: true
       });
     </script>
     </body>