Build list of tracks as soon as a playlist loads to allow safe delta callbacks.
Build list of tracks as soon as a playlist loads to allow safe delta callbacks.

spotify/cocoalibspotify,andyvand/cocoalibspotify,CrowdTunes/cocoalibspotify,spectralmind/cocoalibspotify,andyvand/cocoalibspotify,spectralmind/cocoalibspotify,CrowdTunes/cocoalibspotify,spectralmind/cocoalibspotify,andyvand/cocoalibspotify,CrowdTunes/cocoalibspotify,spectralmind/cocoalibspotify,spotify/cocoalibspotify,yingwang/Fspot,spotify/cocoalibspotify,yingwang/Fspot,yingwang/Fspot,CrowdTunes/cocoalibspotify,spotify/cocoalibspotify,andyvand/cocoalibspotify