Add option to be able to import / export playlists

Hello Everybody! First of all thanks for this awsome application!

I would like to have an option to import / export playlists: My playlists are really precious to me and i like to be able to export them:

2 reasons: 1st - backup purpose 2nd - I have a script running wich convert and import them to my Moode-audio player so i always have my playlists synced.

Thanks for your work and attention :-)