Docs: Fix up developer docs on DataConnector (params were wrong)
Merge jaredgrubb/buildbot:doc-dev-data (PR #1088)
fix buildrequest url
autopep8
Merge branch 'nine' of github.com:buildbot/buildbot into nine
fix db

mysql and pg do implicit indexes, that needs to be specified.
another db fix

did forget datetime2epoch, and pg is the only backend to care about it.

Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>
is this the last db fix?

or should I install pg on my dev environment?

Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>
buildset properties

This is a new resource for buildset properties.

There is also a placeholder for build properties, but this first needs a db change
implement addURL

This adds url to the db, with all the tests, and race condition handling
implement setStepStateString
ui: implement buildrequest, url, and trigger steps