[Buildbot] #3459: publish built on Travis docs for each pull request

[Buildbot trac]

#3459: publish built on Travis docs for each pull request
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Reporter:  rutsky  |       Owner:
    Type:  task    |      Status:  new
Priority:  major   |   Milestone:  0.9.+
 Version:          |  Resolution:
Keywords:          |
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Comment (by rutsky):

 In general this issue is resolved: Circle CI builds docs and they can be
 reached in build artifacts tab if user is logged in into Circle CI (GitHub
 account is sufficient).

 However it would be nice to have direct link to docs explicitly attached
 to PR, for example as build status. This can be achieved by setting up bot
 that will receive Circle CI web hook about finished build and posting
 GitHub status update for commit.

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Ticket URL: <http://trac.buildbot.net/ticket/3459#comment:10>
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