This code is released under the libpng license.
-libpng versions 1.2.6, August 15, 2004, through 1.4.2, May 6, 2010, are
-Copyright (c) 2004, 2006-2007 Glenn Randers-Pehrson, and are
+libpng versions 1.2.6, August 15, 2004, through 1.6.1, March 28, 2013, are
+Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
-May 6, 2010
+March 28, 2013