* People may be assigned to multiple research projects.
* Plugin for advanced filter expressions (see also
  https://github.com/jekyll/jekyll/pull/4478)

It may be useful to keep in /vol/rr/www so that future people joining
the group know where to look for edit access.

References #4

* Remove "About" heading
* Hide "Group Publications" heading if there are none
* Centre card on page when no main column content is available
* Remove duplication of title and names configuration
* Shunt role onto same line as title

References #4