Add logos for 11 HIFIS centres in team

Added the 11 logos of the partnering centres in TEAM page

Closes #40 (closed)

team.md

@@ -2,6 +2,8 @@
 title: The Team
 title_image: default
 layout: team
+additional_css:
+    - frontpage.css
 excerpt: A list of HIFIS team members.
 ---
 {%- comment -%}