Join inner classes with Main Models

[marceloboeira]

Currently we have several unnecessary inner classes

• AlbumTrack -> Has the same attributes as Track, but some of the attributes are nil able.
• AlbumArtist -> Should be mapped as an Artist, because it has pretty much the same.

And so on, I guess that would make it simple to use.

[bronzdoc]

I could work on this refactor