Create workflows with more or less automatization and apply it on sales
orders.

A workflow can:

- Apply default values:
  - Shipping Policy (Deliver each product when available or Deliver all
    products at once)
  - Set the invoice's date to the sale order's date
  - Set a sales team
- Apply automatic actions:
  - Validate the order (only if paid, always, never)
  - Send order confirmation mail (only when order confirmed)
  - Create an invoice
  - Validate the invoice
  - Confirm the picking

This module is used by Magentoerpconnect and Prestashoperpconnect. It is
well suited for other E-Commerce connectors as well.
