Implement Order Status in the same way as Invoice Status

• Administration interface as for invoice status (Settings -> Shop -> Invoices)
• Create standard statuses (Cancellation, dispatched, recorded, etc.)
• Fire events when status changes
• Set history when status changes

marked the checklist item Administration interface as for invoice status (Settings -> Shop -> Invoices) as completed

marked the checklist item Create standard statuses (Cancellation, dispatched, recorded, etc.) as completed

marked the checklist item Fire events when status changes as completed

mentioned in commit 9686c711

marked the checklist item Set history when status changes as completed

added Github label

closed

removed Github ~5331 labels

mentioned in issue #131 (closed)