changes of attendees md files

attendees/laurent.md

----
-layout: default
-name: Laurent Heirendt
-position: Research Associate
-group: BioCore group
-institution: LCSB
-ghurl: https://github.com/laurentheirendt
-ghimg: https://avatars1.githubusercontent.com/u/20812112
----
+# Laurent Heirendt
 
-<a href="{{ page.ghurl }}"><img src="{{ page.ghimg }}" height="150px"/></a>
-
-# {{ page.name }}
-
-{{ page.name }} is a {{ page.position | downcase }} in the {{ page.group }} at the {{ page.institution }}.
-
-<a href="{{ site.baseurl }}">back</a>
+Laurent is a research associate.

attendees/template.md

----
-layout: default
-name: Firstname Lastname
-position: Position
-group: GroupName
-institution: University of Luxembourg
-ghurl: https://github.com/<yourUserName>
-ghimg: https://avatars2.githubusercontent.com/u/44060023
----
+# Firstname Lastname
 
-<a href="{{ page.ghurl }}"><img src="{{ page.ghimg }}" height="150px"/></a>
-
-# {{ page.name }}
-
-{{ page.name }} is a {{ page.position | downcase }} in the {{ page.group }} at the {{ page.institution }}.
-
-<a href="{{ site.baseurl }}">back</a>
+This is a template.