Easy way to get result.Result as JSON/XML?

[dilawar]

Following program prints result in plain text format.

from ratesb_python import check_model

result = check_model("S->P;k1*S")
print(type(result), result)

<class 'results.Results'> _J0:
  Warning 1004: Flux is not decreasing as product increases.

For many developers/users of this package, especially at cli, it would also be very useful to see result.Results as JSON or XML or any other structured format. If you plan to add this functionality, perhaps it can also be highlighted in the documentation. I believe that a json dump will also be useful when using this package as library and not just at CLI.

Ref: openjournals/joss-reviews#7618