Add Christiaan's profile with coordinates and links

Author: vrptnc

people/Christiaan.json

@@ -0,0 +1,10 @@
+{
+  "nick": "Christiaan",
+  "coordinates": [
+    50.870271, 
+    4.084703
+  ],
+  "links": {
+    "GitHub": "https://github.com/vrptnc"
+  }
+}