deleted:    data/lemma_count.extra_letter.to_wsa
deleted:    data/lemmas_hogy_sep.wsa
deleted:    data/lemmas_o_sep.to_wsa
- these are old data, prepared corpus, won't be needed later, preparing
  will be automated soon
modified:   learner.py
modified:   mdl.py
- mdl now always counts with kullback