Added StackView
Reimplemented AlbumBrowseModel as AlbumModel and added some preliminary qml for browsing
Added more preliminary QML for browsing
Added singleton UI, which will eventually replace UIStateCoordinator
Added Page and singleton UI.qml for revamped state system
Added QuickFactory
Revamped state system and added basic preliminary album browsing
Added check that the QAudioDevice is writeable
Refactored AudioOutput (and consequently Player) and revamped TrackBar