added admin function: add user

homepage/participo/admin.js

@@ -0,0 +1,12 @@
+// What to do when the document is loaded.
+document.addEventListener('DOMContentLoaded', function () {
+    // init materialize elements
+    initSidenav();
+});
+
+function initSidenav() {
+    var sidenavElements = document.querySelectorAll('.sidenav');
+    // var sidenavInstances = 
+    M.Sidenav.init(sidenavElements, {
+    });
+};