[Buildbot] #3376: irc bot build notifications should support builder status change

[Buildbot trac]

#3376: irc bot build notifications should support builder status change
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Reporter:  tardyp       |      Owner:
    Type:  enhancement  |     Status:  new
Priority:  major        |  Milestone:  0.9.+
 Version:  master       |   Keywords:  irc
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 There is already in reporters.util and reporters.mail nice logic to know
 whether a build is a new fail or a new success, etc.

 This feature is very useful for an irc bot (unless you want to vbe flooded
 by success) and already in eight.

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Ticket URL: <http://trac.buildbot.net/ticket/3376>
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Buildbot: build/test automation