Project Invoice Module ###################### The Project Invoice module adds invoice methods on project. The methods are: - Manual: Tryton doesn't create any invoice. - On Effort: The invoices are created based on the *Effort* hours for all children works in state *Done*. - On Progress: The invoices are create proportionally to the *Progress* of the *Effort* hours of each children work. - On Timesheet: The invoices are created based on the timesheets encoded on all children works.