No test for loading the serialized model?

[philip30]

Is there currently a guarantee that the serialized parameters will be the same as when we save the model?

I think we should make a test like:

1. x = initialize model
2. do training for several steps
3. path = save the model(x)
4. y = load the model(path)
5. assertEqual(x.param == y.param) ?

[msperber]

I think we're currently only testing that loading a model doesn't cause a crash, so adding a correctness test seems like a nice idea.