codice a supporto della presentazione "bitcoin in codice"
utilizza la libreria bitcore di bitpay
https://github.com/bitpay/insight
https://github.com/bitpay/bitcore-lib/blob/master/docs/index.md
http://jestersimpps.github.io/my-first-experience-with-bitpay-bitcore/
https://www.soroushjp.com/2014/12/20/bitcoin-multisig-the-hard-way-understanding-raw-multisignature-bitcoin-transactions/
https://en.bitcoin.it/wiki/Script
bitpay/bitcore#1457
https://testnet.manu.backend.hamburg/faucet
https://live.blockcypher.com/btc-testnet