v0.1.2 Release

[kandersolar]

Checklist

The following items must be addressed before the code can be merged.
Please don't hesitate to ask for help if you are unsure of how to accomplish any of the items.
You are free to remove any checklist items that do not apply or add additional items that are
not on this list

• Closes v0.1.2 release planning #144
• [ ] Added new API functions to docs/api.rst
• [ ] Clearly documented all new API functions with PEP257 and numpydoc compliant docstrings
• Adds description and name entries in the appropriate "what's new" file
  in docs/whatsnew
  for all changes. Includes link to the GitHub Issue with :issue:`num`
  or this Pull Request with :pull:`num`. Includes contributor name
  and/or GitHub username (link with :ghuser:`user`).
• [ ] Non-API functions clearly documented with docstrings or comments as necessary
• [ ] Added tests to cover all new or modified code
• Pull request is nearly complete and ready for detailed review

[kandersolar]

@cwhanse @kperrynrel ready for review. Mostly just rearranging/reformatting the v0.1.2 what's new page; I think it's a bit nicer this way but am open to rearranging again if needed. Here's the PR build: https://pvanalytics--150.org.readthedocs.build/en/150/whatsnew/0.1.2.html

After everyone signs off and we merge this, I'll tag and make sure the release process completes successfully. Might also take this opportunity to write a "release procedure" wiki page like we have for pvlib...

[kperrynrel]

Looks awesome! Thank you for all your hard work on this!