Snake is now a class, this marks the start of OOPing this thing
Snakes are now an array, making for much sleeker code
Optimized AllSnakeThings, at the cost of debug features like grow-on-key-stroke
Self-collision is in
Food is in (currently will cause lag with very large snakes due to re-rolling rng if position occupied by snake segment)
Wall pass-through is in as well, right wall is a bit iffy because of the scroll bar and the auto-advance of the cursor on write
