Track object defined, track loading implemented
Wrapped objects now are persistent and not local, so the garbage collection won't bother them. Also switched a few pointers and references to objects to avoid errors
SpotifyWrapped is now a template class to seperate the static fields. NodeCallback works on V8 Objects instead of SpotifyWrappeds.
Retabbing
Added mutex and condition to all objects for waiting & race conditions
Frontend changes to display tracks for a playlist