update Piwik to version 2.16 (fixes #91)

www/analytics/vendor/piwik/decompress/src/DecompressInterface.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/lgpl-3.0.html LGPL v3 or later
+ */
+
+namespace Piwik\Decompress;
+
+/**
+ * Interface of a class that can decompress files.
+ */
+interface DecompressInterface
+{
+    /**
+     * Constructor
+     *
+     * @param string $filename Name of the archive
+     */
+    public function __construct($filename);
+
+    /**
+     * Extract files from the archive to the target directory
+     *
+     * @param string $pathExtracted Absolute path of target directory
+     *
+     * @return mixed Array of file names if successful; or 0 if an error occurred
+     */
+    public function extract($pathExtracted);
+
+    /**
+     * Get error description for the latest error
+     *
+     * @return string
+     */
+    public function errorInfo();
+}