[BUG] copying models with recharge models can go wrong

[raoulcollenteur]

Describe the bug

If arguments are provided to a recharge model, for example ps.rch.FlexModel(interception=False), and the model is copied or stored and loaded from a pas-file (same thing), the results are not the same. This is because recharge objects are not stored properly. The correct way to do this is to add a to_dict method, which exports the exact same arguments that go into the init of the class, plus the name of the class. This needs to be changed.

To Reproduce
Run example_snow.py.
ml2 = ml.copy()

=> model is different, no snowmodel.

Expected behavior

Return the same model.

Solution

The solution is easy, properly implement a to_dict method for recharge models. PR coming up.

[raoulcollenteur]

Fixed as per #493 . Closing issue.