update Piwik to version 2.16 (fixes #91)

www/analytics/plugins/DBStats/API.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * Piwik - Open source web analytics
+ * Piwik - free/libre analytics platform
  *
  * @link http://piwik.org
  * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
@@ -12,14 +12,9 @@ use Piwik\Common;
 use Piwik\DataTable;
 use Piwik\Piwik;
 
-/**
- * @see plugins/DBStats/MySQLMetadataProvider.php
- */
-require_once PIWIK_INCLUDE_PATH . '/plugins/DBStats/MySQLMetadataProvider.php';
-
 /**
  * DBStats API is used to request the overall status of the Mysql tables in use by Piwik.
- *
+ * @hideExceptForSuperUser
  * @method static \Piwik\Plugins\DBStats\API getInstance()
  */
 class API extends \Piwik\Plugin\API
@@ -29,18 +24,16 @@ class API extends \Piwik\Plugin\API
      */
     private $metadataProvider;
 
-    /**
-     * Constructor.
-     */
-    protected function __construct()
+    public function __construct(MySQLMetadataProvider $metadataProvider)
     {
-        $this->metadataProvider = new MySQLMetadataProvider();
+        $this->metadataProvider = $metadataProvider;
     }
 
     /**
      * Gets some general information about this Piwik installation, including the count of
      * websites tracked, the count of users and the total space used by the database.
      *
+     * 
      * @return array Contains the website count, user count and total space used by the database.
      */
     public function getGeneralInformation()