refract: cleanup folder structure

rename data folder models to differentiate from directory of db

server/src/models/eventsDefinition.js

@@ -0,0 +1,21 @@
+export const event = {
+  title: '',
+  subtitle: '',
+  presenter: '',
+  note: '',
+  timeStart: 0,
+  timeEnd: 0,
+  isPublic: false,
+  type: 'event',
+  revision: 0,
+};
+
+export const delay = {
+  duration: 0,
+  type: 'delay',
+  revision: 0,
+};
+
+export const block = {
+  type: 'block',
+};