Add irradiance.clearsky_index#571

Merged

cwhanse merged 19 commits intopvlib:masterfrom

kevinsa5:master

Jan 31, 2019

Commits on Sep 11, 2018

basic code for irradiance.clearsky_index, still needs full docstring and tests
kevinsa5
committed

Commits on Nov 22, 2018

Update pvlib/test/test_irradiance.py to remove extra spaces
kevinsa5
authored

Commits on Jan 26, 2019

Commits on Jan 27, 2019

rename poorly-named variables in irradiance.clearsky_index
kevinsa5
committed

Commits on Jan 31, 2019

refactor irradiance.clearsky_index to simplify type-handling logic. also changed behavior for input inf values to set clearsky index to zero
kevinsa5
committed
revert change to inf/nan handling; input infs yield clearsky_index=nan
kevinsa5
committed