prepared the 1.13.1 release

CHANGELOG

@@ -1,4 +1,4 @@
-* 1.13.1 (2013-XX-XX)
+* 1.13.1 (2013-06-06)
 
  * added the possibility to ignore the filesystem constructor argument in Twig_Loader_Filesystem
  * fixed Twig_Loader_Chain::exists() for a loader which implements Twig_ExistsLoaderInterface

ext/twig/php_twig.h

@@ -15,7 +15,7 @@
 #ifndef PHP_TWIG_H
 #define PHP_TWIG_H
 
-#define PHP_TWIG_VERSION "1.13.1-DEV"
+#define PHP_TWIG_VERSION "1.13.1"
 
 #include "php.h"
 

lib/Twig/Environment.php

@@ -16,7 +16,7 @@
  */
 class Twig_Environment
 {
-    const VERSION = '1.13.1-DEV';
+    const VERSION = '1.13.1';
 
     protected $charset;
     protected $loader;