Prepare 1.6.0 release (#72)

Author: staabm

cs2pr

@@ -16,7 +16,7 @@ error_reporting(E_ALL);
 ini_set('display_errors', 'stderr');
 gc_disable();
 
-$version = '1.5.1-dev';
+$version = '1.6.0';
 
 // options
 $colorize = false;