update Piwik to version 2.16 (fixes #91)

www/analytics/plugins/PiwikPro/PiwikPro.php

@@ -0,0 +1,27 @@
+<?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\PiwikPro;
+
+class PiwikPro extends \Piwik\Plugin
+{
+    /**
+     * @see Piwik\Plugin::registerEvents
+     */
+    public function registerEvents()
+    {
+        return array(
+            'AssetManager.getStylesheetFiles' => 'getStylesheetFiles',
+        );
+    }
+
+    public function getStylesheetFiles(&$stylesheets)
+    {
+        $stylesheets[] = 'plugins/PiwikPro/stylesheets/widget.less';
+    }
+}