devNotes 1-28-2017 Streaming UI

        public void onButton_Play_URL()
        {
            TimeSpan OffsetStart = TimeSpan.Zero;
            Stop();
            PlayAudioStream(url_Strings[url_String_idx], OffsetStart);
            if (++url_String_idx == url_Strings.Length) url_String_idx = 0;
        }