update Piwik to version 2.16 (fixes #91)

www/analytics/core/Updates/2.4.0-b8.php

@@ -0,0 +1,29 @@
+<?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\Common;
+use Piwik\Updater;
+use Piwik\Updates;
+
+class Updates_2_4_0_b8 extends Updates
+{
+    public function getMigrationQueries(Updater $updater)
+    {
+        return array(
+            "ALTER TABLE `" . Common::prefixTable('session')
+            . "` CHANGE `id` `id` VARCHAR( 255 ) NOT NULL " => false,
+        );
+    }
+
+    public function doUpdate(Updater $updater)
+    {
+        $updater->executeMigrationQueries(__FILE__, $this->getMigrationQueries($updater));
+    }
+}