added staging configurations
added gems required for staging
refs #65 #67 changed expense report email recipient
refs #65 #67 added staging, development mail interceptor
refs #65 few changes in delta report
refs #65 #67 removed mail interceptor duplication
refs #65 #67 changes in interceptor for test env
refs #72 changed date format to yyyy-mm-dd for import history, empty container page
refs #72 added customer name on import->history page
refs #72 label change for customer column import->history
permited remarks for bill of lading updation
refs #73 change in heading and labels
refs #73 disable Payment Clearing, Cheque Clearing for Export BL
refs #74 added rate agreed and weight field for new order-> import
refs #72 added equipment type on import->history
refs #75 added migration to add column invoice_number to import_expenses
refs #75 added invoice number on import_expense edit screen
refs #75 added migration to add invoice fields to movement
refs #75 added invoice fields to export->history
refs #75 invoice fields made editable: export->history