sbt/sbt-pgp — pull request #54 by jsuereth (2014-05-08 14:12:18+00:00)
Title: Migrate to sbt 0.13.5 and AutoPlugin support

This drops support for anything previous to sbt 0.13.5.

Assumptions:

1. We cut a branch for previous sbt releases and fixes
2. New development works towards a 1.0 release that will support all sbt 1.0 features (autoplugins being a big one).