Added very rudimentary support for packages with multiple subtitle files,

treating the first subs file as the only file so the button can remain a toggle

player.js

@@ -655,10 +655,14 @@ function setupSubs(subs, subCookie, accessToken) {
         button.parentNode.removeChild(button)
         return
     }
+
+    var subsName = Object.keys(subs)[0]
+    var subsFile = subs[subsName]
+
     document.querySelectorAll('video').forEach(function(stream) {
         var subtrack = document.createElement('track')
         subtrack.kind = 'subtitles'
-        subtrack.src = subs + '?token=' + accessToken
+        subtrack.src = subsFile + '?token=' + accessToken
         stream.appendChild(subtrack)
     })