Upgrade to MkDocs 0.17
On the live server, we are currently running MkDocs 0.16.1.
As of Oct, 2017, MkDocs 0.17 is out. Unfortunately, it has some breaking changes with 0.16. The only motivation to upgrade (as far as I can tell) is just to keep up with things so that we don't fall too far behind. Currently, trying to publish a book with docs-publisher on a system that has MkDocs 0.17.0+ results in the following error:
Build errors encountered. Book not published. Build error: 'MkDocs was unable to build the book. MkDocs command output: WARNING - Config value: 'theme_dir'. Warning: The configuration option {0} has been deprecated and will be removed in a future release of MkDocs. WARNING - Config value: 'site_favicon'. Warning: Unrecognised configuration name: site_favicon Aborted with 2 Configuration Warnings in 'strict' mode!
I havnen't gotten too deep into this yet. Just deep enough to predict that it's going to be a bit of a project.