Maze type 3 (stairs) is now passable. You enter a maze on the space in FRONT of the stairs, but you exit it when you step ONTO the stairs.
Issue #45 - You can no longer see sprites through walls in the maze.
Issue #45 - Fixed the bug that was causing crazygonuts lines to appear for single frames during maze animation (it was essentially a divide-by-zero error).
Issue #45 - A better fix for the crazy lines bug, this time at the source (in perspectiveTransform) - it lets us draw polygons that are partly in front of and partly behind the screen, which fixes the peripheral vision thing.
Issue #45 - Light level in maze is now adjustable, and affects visibility distance as well as polygon and backdrop brightness. It's a hard-coded constant for now.
Reset default maze brightness to 5