Added new master student

Author: amjjbonvin

_data/members.yml

@@ -72,10 +72,14 @@
   avatar: /images/people/Lorenzo_Possanzini.jpg
 
 - name: Qingyang Yang
-  position: M.Sc Student
+  position: Visiting M.Sc Student
   avatar: /images/people/Qingyang-Yang.png
 
 - name: Jahaciel Villaverde Nogues
   position: M.Sc Student
   avatar: /images/people/Jahaciel-Villaverde.jpg
 
+- name: Robert Romijn
+  position: M.Sc Student
+  avatar: /images/people/Robert-Romijn.png
+