Add documentation for djblets.auth.

Review Request #7387 — Created June 5, 2015 and submitted — Latest diff uploaded

Information

Djblets
release-0.9.x
5d37276...

Reviewers

This adds some much-needed documentation to djblets.auth, the oldest
part of the Djblets codebase. These fill in module docs, signal docs,
views, forms, function arguments, and so on.

Built the docs and looked through them. Didn't see anything obviously
wrong.