OptiPNG 0.4.5: Advanced PNG optimizer.
Copyright (C) 2001-2004 Cosmin Truta.

Goals:
  To provide a powerful PNG optimizer;
  To demonstrate how to implement a PNG optimizer.

License:
  Open-Source (zlib/libpng license).
  Please see the attached LICENSE.

URL:
  http://www.cs.toronto.edu/~cosmin/pngtech/optipng/

Build instructions:
  Extract the source archive:
    e.g. "tar -xzf optipng-0.4.5.tar.gz" or "unzip optipng-0.4.5.zip"
  Go to the source directory:
    "cd optipng-0.4.5/src"
  Run the appropriate makefile from the scripts directory:
    e.g. "make -f scripts/makefile.gcc" or "nmake -f scripts/makefile.msc"