modified:   automaton.py
fixed one bug related to call log on a value being already in log space
modified:   automaton.py
- smoothing is now an option
- normalization after smoothing simplified a lot, because I don't care
  about actually smoothing to eps and then normalizing, and with that,
  some probability is removed from eps
modified:   automaton.py
- nodes are renamed to states in a bunch of code in automaton.py
modified:   learner.py
- node -> state
modified:   mdl.py
- moore_mdl() is partially implemented
modified:   automaton.py
- when computing distance, everything is in probs now, and if one of the
  probs is zero, it is changed to Automaton.eps to avoid
  ZeroDivisionError
modified:   learner.py
- missing dump bug fixed
modified:   learner.py
- debug level changed back, I was stupid at the previous commit
modified:   mdl.py
- return 0 if nothin