update Piwik to version 2.16 (fixes #91)

www/analytics/plugins/Installation/Menu.php

@@ -0,0 +1,24 @@
+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik\Plugins\Installation;
+
+use Piwik\Menu\MenuAdmin;
+use Piwik\Piwik;
+
+class Menu extends \Piwik\Plugin\Menu
+{
+    public function configureAdminMenu(MenuAdmin $menu)
+    {
+        if (Piwik::hasUserSuperUserAccess()) {
+            $menu->addDiagnosticItem('Installation_SystemCheck',
+                                   $this->urlForAction('systemCheckPage'),
+                                   $order = 1);
+        }
+    }
+}