v4.7.0

Changed

• Fingerprint corpora are voted on rather than tried largest first (#49).
  A corpus is present when more than 31% of its lines are, as before, and
  at least five of them. Among those present, the one that best accounts
  for the input wins. The score is a weighted F1 in which a line many
  corpora share counts for little, so the lines one distribution alone
  logs decide. When nothing in the input tells two corpora apart, both
  are named in one label, a|b, rather than one being guessed. The
  winner's lines are then set aside and the rest vote again, so two
  reboots in one log both collapse.

Fixed

• A rhel5 reboot was also labelled rhel4-reboot.fp, and an ubuntu9.04
  reboot ubuntu10.04-reboot.fp. The larger corpus claimed the reboot
  first, then the right one matched what was left.

Added

• Analysis.fingerprint_scores lists a FingerprintScore (name,
  detection, identity) for every corpus that was present, so a caller can
  see the vote behind fingerprints_matched. -v logs the same.