In order to resolve issues #652 and #653 in the devguide (which are duplicates of each other), we added a theme variable to python_docs_theme/layout.html in PR #67. This will allow all users of the python-docs-theme library to have more functionality and backwards compatibility. In addition, if users don't define a link for copyright information, then they won't have a broken link that leads to nowhere in their page footer.

In order to have the correct copyright link for the devguide specifically, we just needed to specify it in the html_theme_options dictionary in the devguide's conf.py, which I did in this commit.