Fixed license headers. See arduino#3498

Author: Federico Fissore

libraries/LiquidCrystal/README.adoc

@@ -7,7 +7,8 @@ http://www.arduino.cc/en/Reference/LiquidCrystal
 
 == License ==
 
-Copyright (c) Arduino LLC. All right reserved.
+Copyright (C) 2006-2008 Hans-Christoph Steiner. All rights reserved.
+Copyright (c) 2010 Arduino LLC. All right reserved.
 
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public