document changes in train-2013.10.09 (HEAD sha 3c28221)

  I didn't freeze dev while I was branching the trains, so
  the train-related commits are landing in dev *after* some
  stuff which belongs to the following train. The latest
  merge in train-2013.10.09 is 3c28221, and not any of the
  commits introduced by merge bf1f19f. Derp.
bump version in dev after branching train-2013.10.09