LICENSE.txt: bump copyright year

Author: XhmikosR

LICENSE.txt

@@ -1,16 +1,16 @@
-Copyright 2011, Brandon Aaron (http://brandonaaron.net/)
- 
+Copyright (c) 2013, Brandon Aaron (http://brandonaaron.net/)
+
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
 "Software"), to deal in the Software without restriction, including
 without limitation the rights to use, copy, modify, merge, publish,
 distribute, sublicense, and/or sell copies of the Software, and to
 permit persons to whom the Software is furnished to do so, subject to
 the following conditions:
- 
+
 The above copyright notice and this permission notice shall be
 included in all copies or substantial portions of the Software.
- 
+
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND