///////Run:
~ go run wallet/cmd/main.go createblockchain -address "name" to create a blockchain with a specified address;
~ go run wallet/cmd/main.go printchain to print the chain;
~ go run wallet/cmd/main.go getbalance -address "name" to get actual balance of coins in the specified address;
~ go run wallet/cmd/main.go send -from "name" -to "name" -amount 123 to send the specified amount of coins from specified address to specified address;
~ go run wallet/cmd/main.go createwallet to create new Wallet;
~ go run wallet/cmd/main.go listaddresses to list existing wallets;