close #62 Change order status update interface method from push to polling way. and finish to implement order status notification service
Implement #49, and #50.
Register order status update service once order is submitted.
remove trash files (those were already moved to different file path)
update price at server side database

#70
implements #74
Resolve #85 ; update orderlist to show todays order as a default
Created order status objects

Close #57
Implement order rejection object

Close #56
Close #51, Logic to retrieve order completion notification message from the server
Implemented notification retrieving and notify function.
Order Detail view is not included, OrderDetail.java(Activity to show order detail) is dummy activity