A smoother campus — SurLeFil Steam update #5981638

The campus runs noticeably faster outdoors. A shading effect was redrawing the whole scene a second time every frame, for depth that the baked lighting already provides. It now runs indoors only, where it earns its cost. The campus lighting has been baked again: the buildings added this summer are lit properly, and corners and foliage carry their own shading. A gap in the ground collisions near the Scriptorium has been closed. The frame-rate counter is no longer always on screen. Press F3 to show or hide it, in any scene.