Fix typo in member name.
Forgot FullScreen getter
Add discrete notification themes.

This defines 3 themes:
-notification
-notification-image
-notification-full

Use three distinct themes as it's easier to define than using statetype widget
Use new notification theme and add full-screen notification support
Update RAOP notification to cater for new Notification Center behaviour.

The "New" notification type define how the notification will appear on screen, it can't be changed once open. So we must always send a MythMediaNotification as our first notification.
Add support for AirPlay photo-streaming.

This uses the new full screen notification.

Reduce verbosity in notification, AirPlay establishes 3 TCP connections before anything happen, that would produce a lot of unnecessary notification, so now only display them when a connection has been fully established.