TODO add doc string

def send(self, wifs, txouts, change_address=None, lock_time=0, fee=10000):
        """TODO add doc string"""
        # FIXME test!!
        rawtx = self.create_tx(txouts=txouts, lock_time=lock_time)
        rawtx = self.add_inputs(rawtx, wifs, change_address=change_address,
                                fee=fee)
        return self.publish(rawtx)