[Buildbot] #3082: send weekly bug summary, mergeable pull requests from bb infra

[Buildbot trac]

#3082: send weekly bug summary, mergeable pull requests from bb infra
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Reporter:  dustin       |       Owner:  dustin
    Type:  enhancement  |      Status:  new
Priority:  minor        |   Milestone:  sys - on-bb-infra
 Version:               |  Resolution:
Keywords:               |
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Comment (by skelly):

 Does the weekly script require anything beyond what Buildbot requires?
 This mixes responsibilities but could use the virtualenv that metabbot or
 nine use.

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Ticket URL: <http://trac.buildbot.net/ticket/3082#comment:4>
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Buildbot: build/test automation