Wrapper for clearsky filter combining csi and pvlib models

[martin-springer]

• [x] Code changes are covered by tests
• [x] Code changes have been evaluated for compatibility/integration with TrendAnalysis
• [x] New functions added to __init__.py
• [x] API.rst is up to date, along with other sphinx docs pages
• [x] Example notebooks are rerun and differences in results scrutinized
• [x] Updated changelog

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 81.25000% with 3 lines in your changes are missing coverage. Please review.

:exclamation: No coverage uploaded for pull request base (aggregated_filters_for_trials@26bb72d). Click here to learn what that means.

Files	Patch %	Lines
versioneer.py	0.00%	2 Missing :warning:
rdtools/analysis_chains.py	80.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## aggregated_filters_for_trials #412 +/- ## ================================================================ Coverage ? 71.70% ================================================================ Files ? 13 Lines ? 2820 Branches ? 0 ================================================================ Hits ? 2022 Misses ? 798 Partials ? 0 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.