add recurence to agenda web

src/app/models/event.model.ts

@@ -4,11 +4,13 @@ import { EventPerson } from './eventperson.model';
 
 
 export interface EventRecurrence {
-    Type: number | string;
+    Type?: number | string;
     Day?: number;
     DayOfWeek?: number;
     Month?: number | string;
     LastOccurrence?: Date | string;
+    frequency?: string,
+    until?: string
 }
 
 export class Event{