1.2.0
This incorporates changes including:
- Enables users to control confidence intervals reported in degradation calculations (issue #59)
- Adds python 3 support (issues #56 and #67)
- Fixes bugs (issues #61 and #57)
- Improvements/typo fixes to docstrings
- Fixes error in check for two years of data in
degradation_year_on_year
- Improves the calculations underlying
irradiance_rescale