Log Message:
audio/spotify-qt: update to 3.1

Fixes:
-Fixed not setting some default settings properly.
-Fixed Spotify client not starting if using file extension.
Changes:
-D-Bus support is now optional and is automatically enabled if Qt 5
D-Bus is found (#30).
-MPRIS media controller is now available on platforms where D-Bus is.
-Improved application logging.
-Added a new log viewer for viewing and saving application logs.
-Redesigned artist view with new context button.
-Settings are now restored if they are corrupt or invalid.