Added javascript-specific serialization of Wallet (and deser for test purposes)
Added javascript-specific serialization of Wallet (and deser for test purposes)

exonum/exonum,alekseysidorov/exonum,alekseysidorov/exonum,exonum/exonum,exonum/exonum,exonum/exonum,alekseysidorov/exonum,alekseysidorov/exonum