scripts have sketchy names

[dhdaines]

While it's unlikely that anyone would seriously be triggered or offended by a script called slave_convg.pl it's true that we wouldn't call it, say, concentration_camp.pl or residential_school.pl.

Beyond being in bad taste, it just doesn't really mean anything useful. We won't be removing Nietzsche's "Beyond Good and Evil" from the LibriSpeech development set or anything like that.

We could call it "Håkan" but perhaps a better name would be something like "train_from_iteration.pl" since, well, that's what it does.