Accurate papersprite projection

I know there were apparently some crashing issues with the incomplete version of this so pls test for things like that before merging, and also make sure things like scale work right (I'm 87% sure it should but just to be safe)

here is an exe I compiled of this code branch that could be used to test maybe srb2win-accurate-papersprites.exe

I think @toaster wanted to change the position of minecart walls when projection was good but this is targeting master and that would be a [puts on extremely serious voice] Netplay-Breaking Change. so that has to go in separately