--- /dev/null
+
+ THE ZLIB/LIBPNG LICENSE (copy from opensource.org)
+
+ Copyright (c) <year> <copyright holders>
+
+ This software is provided 'as-is', without any express
+ or implied warranty. In no event will the authors be
+ held liable for any damages arising from the use of this
+ software.
+
+ Permission is granted to anyone to use this software for
+ any purpose, including commercial applications, and to
+ alter it and redistribute it freely, subject to the
+ following restrictions:
+
+ 1. The origin of this software must not be
+ misrepresented; you must not claim that you
+ wrote the original software. If you use this
+ software in a product, an acknowledgment in
+ the product documentation would be
+ appreciated but is not required.
+
+ 2. Altered source versions must be plainly
+ marked as such, and must not be
+ misrepresented as being the original
+ software.
+
+ 3. This notice may not be removed or altered
+ from any source distribution.
+