Tale of Flocksworth

I lied last week! I really didn't feel like rewriting world generation just yet so I did a bunch of random busywork. I fixed an issue with the Z-indexing of structures, prevented props from spawning inside structures in a really dirty way, and fixed a multithreading-related duplicate entity issue. I also added some cheap shadows to scenery that will definitely have to be reworked later, and threw together a very primitive day/night cycle. With nothing real left to stall with, I organized and cleaned up a lot of super inconsistent code that had been lying around for a while. Next week for sure!