Implement single funding mature/liquidate
-
Remove balance() and findContractCoins() in favour of getContractFundings()
-
Mutual redemption functions that required a CashScript UTXO now require a ContractFunding
-
Add utility functions to convert between CashScript UTXO and Contract Funding
-
Rename payout -> automatedPayout
-
Rename mature -> matureContractFunding
-
Rename liquidate -> liquidateContractFunding
Closes #153 (closed)