Include to the supported gateways list of external gateways lib owners
Merge pull request #21 from pilot/master

Include to the supported gateways list of external gateways lib owners
FetchTransactionResponseInterface and TransactionInterface
Added DocumentNumber and DocumentType to CreditCard class
Added AdvancedPaymentResponseInterface and BarcodePaymentResponseInterface
Update composer.json extra branch-alias "dev-master" to "2.3.x-dev"
Add parameters TAX and TAX_BASE