Added a waiting message to workflow.html

rowers/templates/workflow.html

@@ -35,6 +35,9 @@
   }
   $.getJSON(window.location.protocol + '//'+window.location.host + '/rowers/workout/{{ workout.id }}/get-thumbnails', function(json) {
   var counter=0;
+  $("#id_sitready").remove();
+  $("#id_thumbs").append(
+  "<p>Click on the thumbnails to view the full chart.</p>");
   $.each(json, function(index, element) {
   console.log('adding thumbnail');
   var counter2 = counter+1;