Chisel GUI revision

1. mapbg preparation
a. Open mapbg.png, then Image>Zealous Crop
b. Change hue to slot color
c. reduce brightness by 50
d. resize to 704x500 with no interpolation
2. Open up vanilla and scale to 1024x1024 with no interpolation
3. Drag guides from the rulers to the edges of vanilla slots
4. Copy scroll to a new layer on the top left
5. Add a new layer for slots
6. Copy the slots to the exact locations shown by the guides

Basically, you want the slots to appear above the vanilla textures, so
you have to place them in the exact same relative pixel on a scaled up
texture.

Hope this helps Drum!