Added default language pack (en-gb)

catalog/extension/payment/sagepay_us.php

@@ -0,0 +1,10 @@
+<?php
+// Text
+$_['text_title']				= 'Credit Card / Debit Card (SagePay)';
+$_['text_credit_card']			= 'Credit Card Details';
+
+// Entry
+$_['entry_cc_owner']			= 'Card Owner';
+$_['entry_cc_number']			= 'Card Number';
+$_['entry_cc_expire_date']		= 'Card Expiry Date';
+$_['entry_cc_cvv2']				= 'Card Security Code (CVV2)';