added NREL SPA algorithm, implemented in wrapped C code with tests
Changed handling of metadata to dicts'
changed handling of metatdata to dicts
changed the way tests inherit functinos
Updates to dictionary handling
Addition of files required for spa_py, and to recompile through cython
Cleaned up relative file imports
cleaned up relative imports
remove extra files
update tutorial to maintain compatability
update to maintain operability
updates to maintain operability
updates
changed local file dependancey
files for test cases
ENH: slightly improved notebook on irradiance functions
Added detail to readme
Merge pull request #2 from bmu/irradiance-notebook

ENH: slightly improved notebook on irradiance functions
Revert "ENH: slightly improved notebook on irradiance functions"
Merge pull request #4 from Sandia-Labs/revert-2-irradiance-notebook

Revert "ENH: slightly improved notebook on irradiance functions"