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

www/analytics/vendor/autoload.php

@@ -0,0 +1,7 @@
+<?php
+
+// autoload.php @generated by Composer
+
+require_once __DIR__ . '/composer' . '/autoload_real.php';
+
+return ComposerAutoloaderInitf46e47e7b0ce25ef7d1d8d8b8c8c1d31::getLoader();