increase bell count when new order is placed on CSR Dashboard

Add functionality for:
1. Auto Refresh the order listing(blue area only) after every 30 sec
through AJAX
2. If new orders are returned through the AJAX(30 sec time interval
query) , then Add more divs for the new orders below the orders list
3. Added audio file
4. Simultaneously Increase the count on the bell icon as per the number
of new orders