Mac2MQTT v0.4.11

• The welcome finds the broker on your network: Home Assistant's host,
  where its Mosquitto add-on listens, and brokers that announce
  themselves. One click puts it into Settings.
• Test Connection in Settings tries the settings as edited, beside the
  reporting connection, and says what went wrong.
• An Audio Output select chooses where sound plays, the speakers or the
  headphones, as the Sound settings do; the Volume tile names it.
• Home Assistant knows at once when the Mac goes to sleep: it says it is
  offline as it sleeps, and online again as it wakes, rather than after
  the broker gives up on it.
• A Displays sensor counts the displays connected, so that one switched
  off at the plug tells from one asleep; the Display tile says which, and
  how many are connected.