[130] In(ter)operability

I got sick this week, and as such got an embarrassingly small amount of work done.

I worked on implementing the object state cache, and collision detection. Only the latter of which I'll bother showing though, as the former is really simple and not at all interesting.

I can't really explain how it works right now, at least in part because it doesn't quite work itself.

Here's the current code for the routine that checks for player collisions with a rectangle: