is_current method added to check an event is current and function addded to refresh conference_wide_information

app/assets/javascripts/refresh_current_events.js

@@ -0,0 +1,10 @@
+$(document).ready(function() {
+  // will call refreshCurrentEvents every 15 minutes
+    setInterval(refreshCurrentEvents, 900000)
+  });
+
+function refreshCurrentEvents(){
+  $.ajax({
+    url: "conference_wide_screen.js"
+  });
+};