Add team page with member information and pictures

- Also make use of the {%- syntax to reduce whitespace in the generated
HTML for the team member includes
- Fix alignment of title in the section part

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 -%}