sdesc: "Optimize PNG image files"
ldesc: "An optimizer for PNG (Portable Network Graphics) files. Its main
purpose is to reduce the size of the PNG IDAT data stream by trying
various compression levels and PNG filter methods. It also can be used
to remove unwanted ancillary chunks, or to add certain chunks
including gAMA, tRNS, and textual chunks."
category: Graphics
requires: cygwin