Modified lambda execution to ignore NAN entries
improved performance for dealing with NaN input data, original fix could not handle 0-d inputs
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
add __init__.py file to spa_c_files
tell git to ignore spa_c_files/build*
Merge pull request #26 from UARENForecasting/location

add location.py and tests
Merge pull request #27 from UARENForecasting/develop-solarposition-integration

solarposition integration with tests
add imports and logging to init
add ephemeris function to solarposition