right, I usually try to consume as a whole first.  Do you mind checking the docs on the launcher to see if they need updated?  

e.g. here https://github.com/sbt/sbt/blob/0.13/src/sphinx/Detailed-Topics/Launcher.rst

Also, would love some docs on the API diff feature as well.  New docs not necessary for this PR, but would like to see them follow soon after.