Set versions in relnotes
Merge branch 'buildbot-0.8.9'
fixing broken link for systemd unit files in 0.8.9 release notes
Merge tflink/buildbot:fix-089-relnotes-link (PR #1163)
Merge branch 'master' into nine
Merge branch 'nine' into 'master'

+autopep8, etc.
merge README.md into relnotes
add note about WebStatus removal
fix navbar minor annoyance
fix typo in comment
clarify warnings about builder categories

..and include builder categories in relnotes
Merge kviktor/buildbot:minor-navbar-fix (PR #1164)
Lot to do