Backend stuff mostly done, here is the only remotely visually interesting result of this! The single test battle map I've been using is no more, and we can grab one of any number of battle maps defined per area of the game. Yay?

I also learned that the code that aligns the battle map with the camera is horrifically broken and only happens to spit out workable results, which is very neat! But I don't have the brain cells to fix it at this specific moment