USPS Shipping Method for WooCommerce

Add Canada Delivered Duty Paid (DDP) shipping method as a shipping option.

There is already a $6.95 surcharge on shipping from the USA to Canda on First Class Package International Service™ (thanks for not telling us about that btw, the surcharge of $6.95 was just added to this method ).

We need to be able to show the customer when calculating shipping what they pay for. Also, we need to be able to print this 6.95 on invoices for customs.

Thanks for you consideration,
Eva