add convert-txs script
add convert-txs script

lamassu/lamassu-server,naconner/lamassu-server,naconner/lamassu-server,lamassu/lamassu-server,lamassu/lamassu-server,joshmh/lamassu-server,joshmh/lamassu-server,joshmh/lamassu-server,joshmh/lamassu-server,naconner/lamassu-server