Looks like we've been stuck on Emscripten fastcomp backend, misssing out on all new optimisations between LLVM 6 and LLVM 11 and going via slow asm.js pipeline when building.
This changes Docker images for Emscripten projects to point to emscripten-upstream instead and commits the updated artifacts.
* lol zx quant
* Adding ZX option
* Improving colour selection so we don't end up with the same colour twice. Also fixing a bug with the colour conflict resolution.
* Putting it behind a konami code
* Better comments
* Adding comment
* Removing unnecessary malloc.