Add user invitation facilities RSM-5

Adds user invitation to teams, and framework for assigning taems
Also adds user acc. deletion.

public/js/globaltooltip.js

@@ -1,4 +1,5 @@
 $(document).ready(function() {
     $('input[rel="txtTooltip"]').tooltip();
     $('span[rel="spanTxtTooltip"]').tooltip(); // Also allow span tooltips
+    $('button[rel="buttonTxtTooltip"]').tooltip(); // button tooltip
 });