Check if deezer integration script can be improved with events

[badcel]

Deezer has multiple events which could be subscribed:

Events.subscribe(Events.player.play, this._onPlayerPlay);

This would avoid polling in the integration script. If one property changes all properties could be read.

[badcel]

Even more possible events:
Events.subscribe(Events.player.volume_changed, this.onVolumeChanged);
Events.subscribe(Events.player.repeat_changed, this.onVolumeChanged);