[Python-buildbots] Filtering build triggers

Would it be possible to add a filter to the build trigger that would skip documentation only changes like the configuration for AppVeyor? (see .github/appveyor.yml) To my knowledge, we don't have any tests dependent on the contents of documentation sources. This would really increase the availability of the workers (especially the slower ones).

Ideally, this could be implemented server-side so as to eliminate "false" successes. I would think that this would help those watching the buildbots (Victor!) for erroneous commits.

-- Jeremy Kloth