Merge branch '27-photos-images-of-core-team-members' into 'master'

Resolve "Photos/images of core team members"

Closes #27

See merge request hifis/hifis.net!31

team.md

+---
+title: The Team
+title_image: default
+layout: team
+excerpt: A list of HIFIS team members.
+---
+{%- comment -%}
+  This markdown file triggers the generation of the team page.
+  Only the frontmatter is required by Jekyll.
+  The contents section does not get rendered into HTML on purpose.
+{%- endcomment -%}