monolingual make rules and sample corpus for apertium-tagger .prob training

[unhammer]

We should have some make rules for the unigram tagger, along with a tiny sample corpus of the right format (e.g. in the subdir corpus). Something like

LANG.prob: corpus/LANG.corpus
	apertium -d . tagger-training-pipeline <$< >$@

(Someone with an idea what the tagger training pipeline looks like will have to fill that out.)

[ftyers]

$(LANG1).prob: corpus/$(LANG1).tagged
        apertium-tagger -s 0 -u 2 $@ $<

[ftyers]

Ok, this is implemented in apertium-kaz