V0 testnet

$ cargo build --release
$ target/release/silk-testnode &
$ time target/release/silk-client-demo
Depositing 10,000 units in Alice's account...
Done.
Transferring 1 unit 10,000 times...
Done.
Checking on Alice's Balance 2118
Checking on Alice's Balance 1989
Checking on Alice's Balance 1870
Checking on Alice's Balance 1742
Checking on Alice's Balance 1593
Checking on Alice's Balance 1477
Checking on Alice's Balance 1349
Checking on Alice's Balance 1240
Done. Checking final balances.
Alice's Final Balance 0
Bob's Final Balance 10000
target/release/silk-client-demo  0.54s user 0.33s system 37% cpu 2.340 total