1. Changes the name of the gateway in the control panel
2. Changes the name of the gateway file
3. Updates URLs to paypal.com
4. Gets rid of use of PayFlow Pro SDK and pfpro extension requirements
5. Updates documentation with name change and new screenshots
"Unable to process payment. Please contact the merchant as the shipping address provided by the merchant is invalid, and the merchant has requested that your order must be shipped to that address."
This change handles this by using the default country setup on the address form settings page when it's not available.