Colors for songs in playlists corresponding to users

[eford1]

Assign each song in the playlist a color corresponding to whose turn it is associated with (not just who voted for it, because there could be multiple voters per song). Keep the colors consistent (keep an array of colors for 1st, 2nd, 3rd user, etc.), so we don't get ugly color combos.

This will illustrate that this is a group experience!