Fix test failure

Caused by a change breaking a new test that had been sitting in a PR.
Merge pull request #286 from d0ugal/master

Fix test failure
Fixes #283. If the mkdocs.yml is completely empty there is a traceback
Catch errors in the Watchdog error handler

Fixes #164
Merge pull request #289 from d0ugal/error-handling

Catch errors in the Watchdog error handler
Fix: yaml parse result could be an invalid structure
Add a test case for empty config file
Renaming
Merge remote-tracking branch 'upstream/master' into empty-config
Fix: command line options take precedent over YAML config
Merge pull request #288 from kaiix/empty-config

Fixes #283. If the mkdocs.yml is completely empty there is a traceback
Remove references to non-existant theme ghostwriter
Merge pull request #291 from d0ugal/master

Remove references to non-existant theme ghostwriter