SDL2 for macOS 9 “rough draft”

New exotic stuff:

- UXN for MacOS 9

- ScummVM, maybe modern games could run under a G4 with Altivec

- Netsurf with the SDL front end

> - ScummVM, maybe modern games could run under a G4 with Altivec

Having done some testing for the PPC version of ScummVM on 10.4 I can say that it won't run many of the more modern games because none of those machines supported shaders on the GPU, which many of the more modern ScummVM supported games like Thimbleweed Park depend on. A software shader implementation could be added in theory if someone had the gumption to build it but it would most likely be unusably slow on those older machines.

TinyGL works, it's being used under the 3D rendering settings at ScummVM. Forget advanced FX, but this is ScummVM, they could implement a simpler version of them.