Spritemap support

[AbelitoGamer]

It would be very helpful to have the ability to repack and export spritemaps.
A spritemap is a single large image that contains all the parts of a character or object, along with two separate files—one that defines each part, and another that defines how those parts form the animation.

Since more and more mods are starting to use spritemaps instead of spritesheets with XML files, having support for this format would be very useful.

Attached, an example of a spritemap.
spritemap.zip

[NeeEoo]

I actually have this work in progress! But its a bit broken, and not a lot of progress has happened due to lack of motivation.