paypro: major refactor. create rfc5280 extension parsing function.
paypro: major refactor. create rfc5280 extension parsing function.

martindale/bitcore,bitpay/bitcore-payment-protocol,bitjson/bitcore,bitpay/bitcore,bitjson/bitcore,bitjson/bitcore,martindale/bitcore,bankonme/bitcore-payment-protocol,MonetaryUnit/bitcore-payment-protocol,bitjson/bitcore,bitpay/bitcore,bitpay/bitcore,bitpay/bitcore-payment-protocol,MonetaryUnit/bitcore-payment-protocol,Bitcoinsulting/bitcore-payment-protocol,bankonme/bitcore-payment-protocol,martindale/bitcore,martindale/bitcore,braydonf/bitcore-payment-protocol,braydonf/bitcore-payment-protocol,bitpay/bitcore,Bitcoinsulting/bitcore-payment-protocol