Merging wfc lane code upstream

Details:
 pos2.php: different behavior for cashier-facing CC terminal
 ReceiptLib.php: updates to CC receipt query building
 TenderReport.php: remove pointless include()
 paycardSuccess.php: re-format if/else to match style
 PaycardLib.php: accepts AmEx
 QMDisplay.php: javascript ignores repeated form entry
 SPH_SignAndPay_USB.cs: commented out some verbose-ness