Migrate from Travis CI to GitHub Actions

[mattwthompson]

• [x] Add GitHub Actions workflow to run CI
• [x] Merge #101

Not intended to be a part of this PR

• [ ] Set up OpenEye in CI

[codecov[bot]]

Codecov Report

Merging #102 (e652165) into master (cc82c7d) will decrease coverage by 6.37%. The diff coverage is 100.00%.

[mattwthompson]

If nothing else, the status passing in the last commit (merging #101) shows that that change passes tests.

[mattwthompson]

I've taken the liberty of also removing un-used scripts (largely boilerplate from the cookiecutter) and updating some of the outdated portions of the README.

[mattwthompson]

The phantom Travis CI status check is blocking my ability to merge since this is in @MobleyLab, not @openforcefield. Are you able to override the status check requirement as an administrator @j-wags? If not we'll need to ping David and/or Caitlin.

[davidlmobley]

@mattwthompson can I do something to help?

[mattwthompson]

Could you merge? This is what I see:

but you may have the "click here to use your administrator privileges" or something to that effect.

This is because the Travis CI check is being reported as required but is removed here. It'll probably not be an issue moving forward. I deleted the webhook, too, for good measure.

[davidlmobley]

Very weird, it's showing me the same thing. I also have not yet found the place to disable the thing which requires status checks to pass before merging. :( Investigating.

[davidlmobley]

Wait, NOW it works -- I may have had to re-authenticate on GitHub. Merging.

[mattwthompson]

Found it - there was a separate branch protection rule requiring that Travis CI pass (not simply a "make sure they're all green, no matter what they are"), which I manually removed.

[mattwthompson]

All done - thanks!