I know, this is more work than it needs to be, but it's for a good cause. I'm working on the Aseprite API plugin for sublime text 3, and the extension I'm releasing with that to show off what it will help people do is a palette editor,saver, modifier wizard thing. It's coming on, and this was a way for me to study the way Aseprite understands extension-style palettes. They are not the same as other types.
For example - in older versions of Aseprite, you could save files in the .pal format - this is no longer the case. That said - the functionality still exists, and my code will reintroduce it, as the .pal format is in my opinion an easier thing to work with over the gimp .gpl that is the new standard.
Sorry for the technical explanation, but I just wanted to say that there's more to this than meets the eye!