[Buildbot] #3214: Document all Data API messages

[Buildbot trac]

#3214: Document all Data API messages
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Reporter:  dustin       |       Owner:
    Type:  enhancement  |      Status:  assigned
Priority:  major        |   Milestone:  0.9.1
 Version:  master       |  Resolution:
Keywords:  mq           |
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Changes (by dustin):

 * milestone:  0.9.0 => 0.9.1


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Ticket URL: <http://trac.buildbot.net/ticket/3214#comment:5>
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