update Piwik to version 2.16 (fixes #91)

www/analytics/core/Updates/2.15.0.php

@@ -0,0 +1,25 @@
+<?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\Updates;
+
+use Piwik\Updater;
+use Piwik\Updates;
+
+class Updates_2_15_0 extends Updates
+{
+    public function doUpdate(Updater $updater)
+    {
+        $pluginManager = \Piwik\Plugin\Manager::getInstance();
+
+        try {
+            $pluginManager->activatePlugin('Heartbeat');
+        } catch (\Exception $e) {
+        }
+    }
+}