* refactor split
* add sigflag to Secret base model
* add better comments
* add comments
* add witnesses inside /split
* more comments
* sign outputs if proofs indicate it
* add signature to outputs but mint does not check it yet
* multiple scriptsigs
* signatures on outputs
* add multisig tests
* rename test
* timelock -> locktime
* move parameters to tags
* convert back to List[List[str]]
* errors are back!
* fix all the stuff
* more testing
* make format
