Delete hosts add info to readme (#251)

* Adding delete event info to the README

README.md

@@ -176,6 +176,21 @@ will be added to the existing host entry.
 If the canonical facts based lookup does not locate an existing host, then
 a new host entry is created.
 
+#### Host deletion
+
+Hosts can be deleted by using the DELETE HTTP Method on the _/hosts/id_ endpoint.
+When a host is deleted, the inventory service will send an event message
+to the _platform.inventory.events_ message queue.  The delete event message
+will look like the following:
+
+```
+  {"id": <host id>, "timestamp": <delete timestamp>, "type": "delete"}
+```
+
+  - type: type of host change (delete in this case)
+  - id: Inventory host id of the host that was deleted
+  - timestamp: the time at which the host was deleted
+
 #### Testing API Calls
 
 It is necessary to pass an authentication header along on each call to the