Allow for training without test set

[emanjavacas]

Currently, tagger.py wouldn't run unless you provide all three splits. Especially for fine-tunning is highly recommendable to not use the test set, since that would actually lead to overfitting on the test set (since you are getting feedback from your model's performance on the test set). You can of course set the test split to be the same as the dev, then you are running the same evaluation twice, which is wasteful.

[emanjavacas]

I just saw there is the include_test param in the config file. I guess that's is redundant with the fact of actually providing a path for --test... we could get rid of that config param.

[Jean-Baptiste-Camps]

In that case, we should do the same with include_dev too, right ?

[emanjavacas]

yes, I think so

[PonteIneptique]

I think this has been fixed by setup_from_disk but I might be wrong