update Piwik to version 2.16 (fixes #91)

www/analytics/core/Translation/Loader/LoaderInterface.php

@@ -0,0 +1,23 @@
+<?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\Translation\Loader;
+
+/**
+ * Loads translations.
+ */
+interface LoaderInterface
+{
+    /**
+     * @param string $language
+     * @param mixed[] $directories Directories containing translation files.
+     * @throws \Exception The translation file was not found
+     * @return string[] Translations.
+     */
+    public function load($language, array $directories);
+}