Ability to create predefined calendar or(and) addressbook for new user

DOCUMENTATION.md

@@ -870,6 +870,26 @@ Command that is run after changes to storage. Take a look at the
 
 Default:
 
+##### predefined_collections
+
+Create predefined user collections
+
+ Example:
+
+     {
+       "def-addressbook": {
+          "D:displayname": "Personal Address Book",
+          "tag": "VADDRESSBOOK"
+       },
+       "def-calendar": {
+          "C:supported-calendar-component-set": "VEVENT,VJOURNAL,VTODO",
+          "D:displayname": "Personal Calendar",
+          "tag": "VCALENDAR"
+       }
+     }
+
+Default:
+
 #### web
 
 ##### type