Immediate next steps

[arcalinea]

• [x] Run on testnet
• [x] Run on two computers
• [x] Get the secret parsed from transactions
• [x] Seller and buyer can find the funding txids themselves from blockchain (buyer finding seller funding tx does work well.)
• [x] Make sure it works well on both blockchains
• [x] More flexible data model
• [x] Add way to test protocol without command line input
• [ ] test locktime conditions
• [ ] test refund conditions