Update to 0.7.1

[zklaus]

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

Closes #27.

This:

• Updates to 0.7.1.
• Switches the source of the package back to PyPI after the successful recovery of the PyPI project
• Adds me as a maintainer

If you object to any one of those things, please let me know.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[zklaus]

@conda-forge-admin, please rerender