[add] Ajout modification demandées par client

README.rst

__init__.py

__manifest__.py

models/__init__.py

models/product.py

models/sale_order.py

models/stock_move.py

report/__init__.py

report/product_pricelist_report.py

report/report_invoice.xml

report/report_pricelist.xml

report/report_saleorder.xml

views/sale_order.xml