ZLIB/LIBPNG LICENSE

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.
