Replace raw track details with reworked object

[jammus]

Rework track object to remove things like #text and @attr. Include raw field to store original data incase preferred.

track: { name: "name", artist: { name: "name", mbid: "mbid" }, images: {small: {}, medium: {}, large: {}}, album: { name: "name", mbid: "mbid" }, url: "url", raw: "raw" }

[jammus]

Track info should include duration.