Update license in the doc.

Author: nathanaelkane

doc/indent_guides.txt

@@ -286,7 +286,7 @@ Bug reports, feedback, suggestions etc are welcomed.
 The MIT Licence
 http://www.opensource.org/licenses/mit-license.php
 
-Copyright (c) 2010-2012 Nate Kane
+Copyright (c) 2010-2013 Nate Kane
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal