pngout
Increase some compression Also corrects some warnings being reported by libpng (via SDL_image); h/t Tim Dickson, closes https://sourceforge.net/p/tuxpaint/bugs/252/
Beginning addition of an option to export animated GIFs from the Open -> Slideshow dialog, after choosing the images. Non-operable at this time, but a button has been added (and will provide a hint to select 2 or more images, when clicked).