Gradients are done with additional parameters to gfx.rectangle, so old code that gave the function too many parameters and expected them to be ignored may break.
Did related changes to sprite.lua and cleaned stuff.
I had to add a function to sf2dlib to make this work, so a make build-sf2dlib is required. Also, we should probably send this change to the original sf2dlib repository...
As the color order of the sf2dlib changed, you have to change it in your code, or use the color.hex() function.
To fix the problems, just change "0xRRGGBBAA" to "0xAABBGGRR".
Also, the shader compiler changed to Picasso, so you'll need it in order to compile.
https://github.com/fincs/picasso
