Signed-off-by: Jerome Luckenbach <github@luckenba.ch>
There is only one Thing available - the `pushover-account`.
You are able to create multiple instances of this Thing to broadcast to different users, groups or devices.
+openHAB is listed as a *featured application* on the [Pushover homepage](https://pushover.net/apps).
+It provides a clone function to directly add a *prefilled* application to your Pushover account and retrieve an API key.
+You can reach it via [https://pushover.net/apps/clone/openHAB](https://pushover.net/apps/clone/openHAB)
+
## Thing Configuration
| Configuration Parameter | Type | Description |