Recommended / Suggested songs

Based on what you're listening to right now 
we already noticed that `track['media$group']['media$thumbnail']` will be empty sometimes. Please follow https://github.com/5punk/Atraci/blob/feature/findMoreLikeThis/coffee/_TrackSource.class.coffee#L64-L66 to make sure we would use default image and then replace them if we can find any thumbnail.