function sync(location, playlist, songIndex) {
    syncMain(location);
    syncPlaylist(location, playlist);
    syncSong(location, songIndex);
    syncSongInPlaylist(location, playlist);
  }
Syncs all of the song slider elements.

@access public
@param {number} location 	- The location of the song as a percentage.
@param {string} playlist 	- The playlist we are setting the song slider for.
@param {number} songIndex 	- The index of the song we are adjusting the song slider for.