Add test for script-to-address using darkwallet multisig address as test vector.
Add test for script-to-address using darkwallet multisig address as test vector.

libmetrocoin/libmetrocoin-explorer,cancoin/libbitcoin-explorer,GroestlCoin/libgroestlcoin-explorer,GroestlCoin/libgroestlcoin-explorer,tuomassiren/libbitcoin-explorer,libtetcoin/libtetcoin-explorer,tuomassiren/libbitcoin-explorer,cancoin/libbitcoin-explorer,libtetcoin/libtetcoin-explorer,GroestlCoin/libgroestlcoin-explorer,libmetrocoin/libmetrocoin-explorer