I checked Drupal 7. Couldn't find this "gift order" functionality. I have cha...

I checked Drupal 7. Couldn't find this "gift order" functionality. I have changed the date in receipt to order creation time. The changes also includes fix suggestions on #15.

Re #17:

Do we want to store this information in the dumping ground that is the data field or should we store this in its own field? I can see arguments for both. I guess this fits into Used to store temporary data during order processing (i.e. checkout)

I think associating gift_order with the entity should be better. For future reference. Suppose we need to create a view and would want to list whether the POS order was a gift order, then this would help.