Description
Is your feature request related to a problem? Please describe.
Add functionality to load (or create) model from .json file. Should ideally be complemented with a corresponding "save model to .json file"
Describe the solution you'd like
A method to create a model object with complete functionality (up to gp.compute_model(model)-step) from a .json file. Important to save/load models, and as a more flexible input/ output feature (instead of multiple .csv files, corresponding python-scripts, etc.).
Describe alternatives you've considered
Current state, which requires too many different files and is, therefore, error-prone.
Additional context
XML formats would also be possible, but I believe .json is a good choice between flexibility and strictness (with enforced schemas).