Add an order action to 'create credit note'
Get transaction ID method
Process_refund()

#3164
PayPal implementation of Process_refund()

#3164
Prevent notices in factory
Use get_transaction_id
Rough, non-functioning example of the UI for refund total and add items in the order items panel

#3164
More refund UI  -show qty boxes and totals
More UI / Split up meta box scripts
split up meta box scripts
created initial refund class and function
fixed refund tax
fixed tax default value
Merge pull request #5810 from claudiosmweb/feature-create-order-refund-function

Initial refund class and function
created order_type taxonomy
add refund term in order_type when install
created initial methods for WC_Order_Refund class
created get_refunds() method for WC_Order class
fixed the get_refunds() method in WC_Order class
set order_type for refunds