[MRG] Added metrics support for multiclass-multioutput classification

Fix for #3453 
Ping @arjoly . Added support for `zero_one_loss` and `accuracy_score`

I mean a separate test for checking that the metrics raise or not the proper exception.
Here your test is named `test_normalize_option_multiclass_multioutput_classification`. The previous line of code are indeed testing `test_multioutput_support`.