Declaring base code

I’m using the latest version of Colorado:

https://digitaldoge.duckdns.org/colorado/

which has all the latest features from Jet Racing (originally my LD27 game) and it has the Lua bindings from Byte Raider, my LD28 game.

Colorado depends on OpenGL 2, PhysFS, SDL 1.2, SDL_Mixer, and GLM, so I’m using all those, too.