store the total amount of achievable XPs for a Questgroup in the database instead of calculating it every time (Issue #281)

www/analytics/plugins/Provider/Controller.php

@@ -0,0 +1,27 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik\Plugins\Provider;
+
+use Piwik\ViewDataTable\Factory;
+
+/**
+ *
+ */
+class Controller extends \Piwik\Plugin\Controller
+{
+    /**
+     * Provider
+     * @return string|void
+     */
+    public function getProvider()
+    {
+        return $this->renderReport(__FUNCTION__);
+    }
+}
+