Add color emulator target and color gfx demo
Support switching between color and legacy modes
Seperate monochrome from color demo
Update kernel
Fix error with gfxdemo on non-color devices
Update gfxdemo with color demo
Fix broken GUI demo
Add more detailed installation steps to README
Fix stack error on castle power menu
Fleshed out gfxdemo, modified the ball demo to use the newly-improved randA