Adding playlist() to player to be able to see the src path for the songs currently in the list. Updated README.md with a call to playlist() to show an example of it's use. Added an example called playlist.js in examples/ to show how playlist() can be used and to see how the list changes when a song is done playing.
Merge pull request #18 from willywos/list-songs-in-playlist

Adding playlist() to player.