project file woahs

[skrshe]

Outside of a possible .rxp (rx project) file in the future, it may be useful to be able to interface with .aseprite, .ase
and other raster project files like .psd, if not superficially.

Doing so might help in efforts to extend rx, as apart from gifs and tifs, there is seemingly no way to save frame / layer info.
Also working on the same document as those who are less technically savy / prefer aseprite could be handy.