fix lossless formats typo. fix disabled image_pipeline program return
rename lossy functions to 'jpeg' to be more accurate
make a GIF_FORMATS set, change lossless functions to be named png to be more accurate
use gifsicle to compress gifs if not converting to pngs
change variable names to reflect conversion to PNG or not
remove changelog. i ain't gonna use it right now
clean up optimize png pipeline by using a loop
fix bug where animated gifs were pngified
version 9.9