Don't mandate a specific way to handle listening events (for now)

examples/echobot.py

@@ -3,13 +3,9 @@ import fbchat
 session = fbchat.Session.login("<email>", "<password>")
 listener = fbchat.Listener(session=session, chat_on=False, foreground=False)
 
-
-@listener.register
-def on_message(event: fbchat.MessageEvent):
-    print(f"{event.message.text} from {event.author.id} in {event.thread.id}")
-    # If you're not the author, echo
-    if event.author.id != session.user.id:
-        event.thread.send_text(event.message.text)
-
-
-listener.run()
+for event in listener.listen():
+    if isinstance(event, fbchat.MessageEvent):
+        print(f"{event.message.text} from {event.author.id} in {event.thread.id}")
+        # If you're not the author, echo
+        if event.author.id != session.user.id:
+            event.thread.send_text(event.message.text)