add @wholmgren clearsky.py and airmass.py
add get_solarposition()
add options for precalculated data
add tutorial for new modules
Modified lambda execution to ignore NAN entries
improved performance for dealing with NaN input data, original fix could not handle 0-d inputs
merge into master
add linke turbidity interpolation by day
Begin construction of atmosphere.py
change function hirearchy, introduce higher level modules, adapt test scripts
remove tmy 2 data
move sphinx
clean up extra files
add sphinx docs
add location.py
add new solarposition.py
add solpos test suite
add location tests
Merge branch 'location' into develop-solarposition-integration
add contributors comments to solarposition