Culture page

Ernst van Nieroprequested to merge
culture into master

In response to #452 (closed) here is the requested culture page.

For now, it has a placeholder for Summit content. @EmilyKyle and @creamzy can you please assist in adding content about the Summit?
@sytses Can you please review the wording in the links to the new culture page, which I placed on the about, jobs, and team pages.

Merge request reports