Add optional support for VTODO tasks

README.md

@@ -50,6 +50,14 @@ This option will remove them entirely from your event summary.
 
 This is to allow you to exclude completed tasks from being added to your calendar. It will also remove tasks from your calendar once they are marked as completed.
 
+### Add tasks as TODO items to your calendar
+
+Enabling this will append all of your tasks as TODO items to the end of your calendar file. Some iCalendar clients are able to render these tasks separate to the calendar events. Some clients that support this include Google Tasks, Microsoft Outlook, Microsoft To Do, Mozilla Thunderbird with Lightning Calendar, Android CalDAV-Sync, Calendars by Readdle, Todoist and OmniFocus.
+
+### Only tasks without dates are TODO items
+
+Enabling this will mean that only tasks that do not have dates will be created as TODO items. If you disable this, then *every* task (tasks with or without a date) will be added to your calendar as a TODO item.
+
 ### Ignore old tasks?
 
 Toggles on or off the functionality where you are able to exclude tasks whose dates are older than the value you specify.