[devel] Updated copyright year in LICENSE, CMakeLists.txt, and manual
diff --git a/libpng-manual.txt b/libpng-manual.txt
index 27d3bef..055526c 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -3,7 +3,7 @@
  libpng version 1.5.1beta04 - January 16, 2011
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
- Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ Copyright (c) 1998-2011 Glenn Randers-Pehrson
 
  This document is released under the libpng license.
  For conditions of distribution and use, see the disclaimer
@@ -13,7 +13,7 @@
 
  libpng versions 0.97, January 1998, through 1.5.1beta04 - January 16, 2011
  Updated and distributed by Glenn Randers-Pehrson
- Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ Copyright (c) 1998-2011 Glenn Randers-Pehrson
 
  libpng 1.0 beta 6  version 0.96 May 28, 1997
  Updated and distributed by Andreas Dilger