Jux & Xenodream: Import of other Gradient-Prestes then .ugr

[Garth Thornton]

The *.map format is simple, but it only holds one gradient, so it would be more convenient to be able to select multiple files to import at once, which complicates the handling a bit.

Which format is *.gradient? I didn't find anything about it yet. I found the PhotoShop *.grd format but that's too complicated to justify at the moment.