Log Message:
py-buildbot: updated to 0.9.14

Buildbot 0.9.14:

Bug fixes
- Compile step now properly takes the decodeRC parameter in account
- Fix duplicate build requests results in
  :py:class:`~buildbot.db.buildrequests.BuildRequestsConnectorComponent` when
  querying the database
- :py:class:`~buildbot.changes.gitpoller.GitPoller` now accepts git branch
  names with UTF-8 characters
- Fixed inconsistent use of `pointer` style mouse cursor by removing it from
  the `.label` css rule and instead creating a new `.clickable` css rule which
  is used only in places which are clickable and would not otherwise
  automatically get the `pointer` icon, for example it is not needed for
  hyper-links.
- Rebuilding with the same revision now takes new change properties into
  account instead of re-using the original build change properties
- Worker authentication is now delayed via a DeferredLock until Buildbot
  configuration is finished. This fixes UnauthorizedLogin errors during
  buildbot restart
- Fixes python3 encoding issues with Windows Service

Features
- new :ref`badges` plugin which reimplement the buildbot eight png badge
  system.
- In progress worker control API. Worker can now be stopped and paused using the UI.
  Note that there is no UI yet to look the status of those actions.
- Make maximum number of builds fetched on the builders page configurable.
- Include `context` in the log message for `GitHubStatusPush`
- On 'Builders' page reload builds when tags change.
- Give reporters access to master single in renderables. This allows access to
  build logs amongst other things
- Added possibility to check www user credentials with a custom class.