0.5.1

• Make VLCVideoPlayer.Proxy conform to ObservableObject, in the instance it is desired that it can be injected into the environment
• Convert all public facing fixed width integers to Int
• MediaTrack is now a struct instead of a tuple pair
• Set the font via the string font name
• Fix setting the audio track index
• VLCVideoPlayer.Proxy now holds a weak reference to the underlying objects