Numerous bug fixes and lighting corrections, general code cleanup, and the addition of directional "eave" lighting.
0.6.7
11/23 - general code cleanup, minor bug fixes
11/25 - all tiers have same light level
11/26 - added eave directional lighting
11/29 - added xskew to seekwalls() to correct for tall/narrow or short/wide textures
12/1 - corrected decorative light dispersement