Automate releases to pypi and anaconda.org on successful build of master

[avmarchenko]

Is your feature request related to a problem? Please describe.
As part of the CI process, on successful build of master, perform a git tag, git push --tags, and dist packaging (see RELEASE.md) and publish to anaconda.org and pypi.org.

Describe the solution you'd like
Automated as part of CI.

Describe alternatives you've considered

Additional context
We'll need to store secrets as env vars in travis most likely