add validation to UsersController and let users change their own data and add breadcrumbs to user pages

views/html/users/delete.tpl

@@ -1,9 +1,11 @@
 <div class="moodpic">
 	<img src="<?=$linker->link(array('grafics','questlab.jpg'))?>" />
 </div>
-<h1><?=_('Users')?></h1>
-<h2><?=_('Delete user')?></h2>
+<ul class="breadcrumbs">
+	<li><a href="<?=$linker->link('index',1)?>"><?=_('Users')?></a></li>
+</ul>
 
+<h1><?=_('Delete user')?></h1>
 <?=sprintf(_('Should the user “%s” (%s) really be deleted?'), $user['username'], $user['email'])?>
 <form method="post">
 	<input type="submit" name="delete" value="<?=_('delete')?>" />