Prepare Products.Paypal2SalesforceLead 1.4.
Revert date format parsing string in paypal2lead.
Warning:  versions 1.1 through 1.3 are broken.  I tested against PayPal's
IPN Simulator which sends payment_date in a different format than an
actual IPN, and thought PayPal's IPN date format had changed.
Version 1.4 reverts the date format change