Feature/playlist details

[josh-burton]

• add play/pause state updates for track list fragments
• add answers analytics events
• disable crashlytics in debug builds

[sregg]

👍 Do you think you could make the button show "Play" once you clicked on "Pause"?

[josh-burton]

Does it not? It should do, I'll have a look :)

[josh-burton]

I've tested that again and it's working for me.