buildbot/buildbot — pull request #328 by tomprince (2012-02-25 06:24:07+00:00)
Title: Document the deprecation of the old step factory interface to BuildFactory.

This has been deprecated for a long time. Warn people that we are removing it.
The motivation for this is that we are changing how we are representing step
factories, and don't want to expose that representation to the user.