[Buildbot] #2971: add some badges to buildbot.net or trac

[Buildbot trac]

#2971: add some badges to buildbot.net or trac
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Reporter:  dustin  |      Owner:  dustin
    Type:  task    |     Status:  new
Priority:  major   |  Milestone:  sys - other
 Version:          |   Keywords:
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 http://shields.io/ has a bunch of automatically-updated badges

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Ticket URL: <http://trac.buildbot.net/ticket/2971>
Buildbot <http://buildbot.net/>
Buildbot: build/test automation