Added default language pack (en-gb)

catalog/mail/order_edit.php

@@ -0,0 +1,9 @@
+<?php
+// Text
+$_['text_subject']      = '%s - Order Update %s';
+$_['text_order_id']     = 'Order ID:';
+$_['text_date_added']   = 'Date Added:';
+$_['text_order_status'] = 'Your order has been updated to the following status:';
+$_['text_comment']      = 'The comments for your order are:';
+$_['text_link']         = 'To view your order click on the link below:';
+$_['text_footer']       = 'Please reply to this email if you have any questions.';