Add preparations for December 1st, 2015

PREPARATIONS.md

+# Preparations for course: Data management with GitLab
+
+- Date: December 1st, 2015
+- Time: 9:00 - 17:00
+- Location: T-0-010
+- Teachers:
+  - Martijn Vermaat <m.vermaat.hg@lumc.nl>
+  - Jeroen Laros <j.f.j.laros@lumc.nl>
+  - Wibowo Arindrarto <W.Arindrarto@lumc.nl>
+  - Szymon Kiełbasa <S.M.Kielbasa@lumc.nl>
+  
\ No newline at end of file