Generates square png files in one of 4 channel modes.
$ pangs input.foo will generate all modes to current dir. You can change it with $ pangs input.foo /some/output/path.
Clean things up with: $ pangs clean or $ pangs clean /some/output/path
Files made out of mp3:
- grayscale
-g
- grayscale + alpha
-ga
- rgb (default)
- rgb + alpha
-a



