Add scale_voltage_current_power to ModelChain.pvwatts_dc (pvlib#1138)

* add scale_voltage_current_power to ModelChain.pvwatts_dc, docstring edits, whatsnew

* extend pvsystem.scale_voltage_current_power to not require all columns, and accept Series

* handle tuples, use temporary DataFrame

* improve scale_voltage_current_power, handle tuples

* sort the new test

* improve scale function, fix multiple string test

* multiple string test runs

* add PR number

* Maintain column order in returned DataFrame

Co-authored-by: Will Holmgren <william.holmgren@gmail.com>

* whatsnew entry formatting

Co-authored-by: Will Holmgren <william.holmgren@gmail.com>

Co-authored-by: Will Holmgren <william.holmgren@gmail.com>

clean up 0.8.1 whatsnew (pvlib#1123)

* whatsnew cleanup

* add missing contributors

* backtick to apostrophe

* remove auto-merge artifact; set release date

clean up 0.8 whatsnew, other minor doc issues (pvlib#1054)

* remove api entry for pvsystem.sapm_aoi_loss

* fix issues in api.rst and whatsnew

* xarray whats new pattern

* fix various rst issues

* missing issues and contributors

* remove travis badge from readme

* Update docs/sphinx/source/whatsnew/v0.8.0.rst

Co-authored-by: Kevin Anderson <57452607+kanderso-nrel@users.noreply.github.com>

* review fixes

* backticks, links

* typooooo

Co-authored-by: Kevin Anderson <57452607+kanderso-nrel@users.noreply.github.com>

pyupgrade --py36-plus, license year (pvlib#1050)

* pyupgrade --py36-plus

* update license year

* stickler

* test invalid model in irradiance.get_sky_diffuse

* Update pvlib/atmosphere.py

Co-authored-by: Mark Mikofski <bwana.marko@yahoo.com>

* Update pvlib/location.py

Co-authored-by: Mark Mikofski <bwana.marko@yahoo.com>

* Update pvlib/modelchain.py

Co-authored-by: Mark Mikofski <bwana.marko@yahoo.com>

* Update pvlib/modelchain.py

Co-authored-by: Mark Mikofski <bwana.marko@yahoo.com>

* Update pvlib/pvsystem.py

Co-authored-by: Mark Mikofski <bwana.marko@yahoo.com>

* Update pvlib/pvsystem.py

Co-authored-by: Mark Mikofski <bwana.marko@yahoo.com>

* Update pvlib/tests/iotools/test_pvgis.py

Co-authored-by: Mark Mikofski <bwana.marko@yahoo.com>

* Update pvlib/tracking.py

Co-authored-by: Mark Mikofski <bwana.marko@yahoo.com>

* Update pvlib/tracking.py

Co-authored-by: Mark Mikofski <bwana.marko@yahoo.com>

* stickler

Co-authored-by: Mark Mikofski <bwana.marko@yahoo.com>

fix github action for publishing releases (pvlib#1039)

* remove test pypi, add tag restriction

* rename

set date for what's new for this release

Updated whatsnew v0.7.2 (pvlib#953)

update whats new for pvlib#844 and other contributors (pvlib#851)

* update whats new for pvlib#844 and other contributors

* rebase

* epw docstring noqa fix

* update whatsnew date

* add anton. minor api.rst clean up

* escape asterisk

* add docs auto_examples to gitignore

* pep8

update whatsnew.rst, add contributors, v0.7.0 release date, address p…

…vlib#809 (pvlib#839)

* update whatsnew.rst, add contributors, v0.7.0 release date, address pvlib#809

* fix dotted line to match date line's length

add missing requests dependency (pvlib#726)