Add participants

PREPARATIONS.md

@@ -32,8 +32,22 @@ Very preliminary, please update, extend, or comment.
 | 15:30 | Leftover minutes  |                   | TODO: assign to some lecture or practical |
 | 16:00 | Questions, drinks |                   |                           |
 
-
-## Comments on the program
-
 - Branches: not in this course
 - Git annex: not in this course
+
+
+## Participants
+
+Our current list (not yet confirmed):
+
+- Saeed Basmagi
+- Rick de Leeuw
+- Roel Zinkstok (ONCO)
+- Martijn Eenink (ONCO)
+- Tooba Tabbassidaloii
+- Soheil Yousefi
+- Tarek Malas
+- Jonathan Vis
+- Thomas Chin-A-Woeng
+- Sake (?)
+- Niels (?)