sbt/sbt — pull request #1244 by jsuereth (2014-04-09 12:34:25+00:00)
Title: Upgrade sbt plugins and version with sbt-git.

* Version number now includes git SHA for snapshots, or the tag.
* Version base string now encoded in `version.sbt`
* Upgrade to latest sbt-site, sbt-git, sbt-ghpages.
* Show deprecation warnings when building sbt.

Review by @eed3si9n