buildbot/buildbot — pull request #527 by djmitche (2012-09-19 13:21:00+00:00)
Title: Add buildsets to the data API

* addBuildset moved from master to a data update method
* schedulers updated to match (note that the addBuildsetForXxx methods
are staying in BaseScheduler)
* assertBuildsets can skip asserting on buildsets. This is ugly, but
once everything else is in the data API, can be straightened out.