v0.8.1

This is a minor release with some feature enhancements and bugfixes.

Feature enhancements:

• Flesh out header auth with support for user attributes like email, photo, etc. (#396) [@matthewwardrop]

Bugfixes:

• Bugfix related to PostProcessor kwargs (#395) [@danfrankj]
• Fix builds breaking in Windows due to conda changes and stricter pycodestyle. [@matthewwardrop]