Update Kohana to 3.1.3.1

includes/kohana/system/config/curl.php

@@ -0,0 +1,9 @@
+<?php defined('SYSPATH') or die('No direct script access.');
+
+return array(
+	CURLOPT_USERAGENT      => 'Mozilla/5.0 (compatible; Kohana v'.Kohana::VERSION.' +http://kohanaframework.org/)',
+	CURLOPT_CONNECTTIMEOUT => 5,
+	CURLOPT_TIMEOUT        => 5,
+	CURLOPT_HEADERFUNCTION => array('Request_Client_External', '_parse_headers'),
+	CURLOPT_HEADER         => FALSE,
+);