Review window positioning algorithm wrt/ neighbor shading

[shorowit]

Window positioning is pretty arbitrary right now since we have no information on where windows are located.

Check where windows are positioned:

1. For multi-story homes
2. For each facade (e.g., middle vs side of wall)

This is only important for evaluating shading from neighboring buildings. Shading from, e.g., overhangs/eaves are already positioned relative to each window.