update Piwik to version 2.16 (fixes #91)

www/analytics/core/Exception/ErrorException.php

@@ -0,0 +1,22 @@
+<?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\Exception;
+
+/**
+ * ErrorException
+ *
+ * @author Matthieu Napoli <matthieu@mnapoli.fr>
+ */
+class ErrorException extends \ErrorException
+{
+    public function isHtmlMessage()
+    {
+        return true;
+    }
+}