Cactus Code Thorn libpng
Author(s)    : Jian Tao <jtao@cct.lsu.edu>
Maintainer(s): Cactus team
Licence      : The zlib/libpng License
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1. Purpose

Distribute the libpng library; see <http://www.libpng.org/>

Portable Network Graphics
An Open, Extensible Image Format with Lossless Compression
(Not Related to Papua New Guinea, the Pawnee National Grassland, 
the Professional Numismatists Guild or the "Pack 'N' Go" format)

The license information about libpng can be found at
http://www.opensource.org/licenses/zlib-license.php