Update README.md

Author: EddyVerbruggen

README.md

@@ -35,10 +35,13 @@ import * as LocalNotifications from "nativescript-local-notifications";
 LocalNotifications.hasPermission()
 ```
 
-## Usage
-
+## Demo app (XML)
 If you want a quickstart, [clone our demo app](https://github.com/EddyVerbruggen/nativescript-local-notifications-demo).
 
+
+## Demo app (Angular)
+This plugin is part of the [plugin showcase app](https://github.com/EddyVerbruggen/nativescript-pluginshowcase/tree/master/app/feedback) I built using Angular.
+
 ### schedule
 On iOS you need to ask permission to schedule a notification.
 You can have the `schedule` funtion do that for you automatically (the notification will be scheduled in case the user granted permission),