NEW: Added ability to set individual payment status' in order admin.
BUG: Run completePayment code in OrderProcessor regardless of whether a receipt has been sent.
API: Created ShopPeriodReport, which can be used to create reports that apply to a specific period, and results can be grouped in different ways.
API: allow defining saveablefields on the AddProductForm, for security, and to allow setting fields like UnitPrice
NEW: Added Product report, Customer report. Fixed sorting in ShopSales Report