Small music player tweaks

public/js/music.js

@@ -3,6 +3,9 @@ var player = '';
 $(document).ready(function() {
   player = $('#music-player').get(0);
 
+  // set the player's volume to 0.5 by default
+  player.volume = 0.5;
+
   // on music track click
   $('.now-playing-list').on('click', '.music-track', function() {
     // change selected track