update setup.py with C++ Extensions for gencumsky.  Currently disabled - requires MS visual studio C++ or other compiler to work.
update setup.py with C++ Extensions for gencumsky.  Currently disabled - requires MS visual studio C++ or other compiler to work.

NREL/bifacial_radiance,NREL/bifacial_radiance,NREL/bifacial_radiance,NREL/bifacial_radiance