Add more loseless PNG compression libraries

[trymeouteh]

Is it possible to add more loseless compression options for PNG files? I am comparing ImCompessor to FileOptimizer which is a great file compressor program for windows which works in Wine but I would always prefer to use a native linux application over using Windows apps in Wine.

ImCompressor JPG compression is the same as FileCompressor with the tests I have done with the same image. However FileOptimizer compression has a better loseless compression on PNG files especially for big images.

For example, when I compress the PNG file in the link below using ImCompressor it will become 1,194,081 bytes in size. With FileOptimizer it will become 951,995 bytes in size.

https://pngriver.com/wp-content/uploads/2018/04/Download-Electronic-Arts-PNG-Image.png

https://nikkhokkho.sourceforge.io/static.php?page=FileOptimizer

[Huluti]

Closing it in favor of #108