Merge pull request #75 from Posnic/sales-bill

sales bill
Merge pull request #76 from Posnic/sales-bill

sales delivery note
Merge pull request #77 from Posnic/sales-bill

Sales bill
Merge pull request #78 from Posnic/direct-delivery-note

direct sales delivery note
Merge pull request #79 from Posnic/direct-delivery-note

direct sales delivery note approve
direct sales
Merge pull request #80 from Posnic/direct-sales

direct sales
sales bill
Merge pull request #83 from Posnic/sales-bill

sales bill
 Sales bill for delivery note
Merge pull request #84 from Posnic/sales-bill

 Sales bill for delivery note
sales bill date table
Merge pull request #85 from Posnic/sales-bill

sales bill date table
customer discount in sales quotation
Merge pull request #86 from Posnic/sales-quotation

customer discount in sales quotation
implement uom in sales quotation
Merge pull request #87 from Posnic/sales-quotation

implement uom in sales quotation
Sales order
Merge pull request #88 from Posnic/sales-order

Sales order
customer discount in Sales order