Add community messages enabled/disabled to pingback stats CRM-12375
CRM-12373

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* CRM-12373: civicrm_mailing_bounce_pattern rules for postfix
  http://issues.civicrm.org/jira/browse/CRM-12373
CRM-12376

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* CRM-12376: CiviMail job with no remaining deliveries gets stuck in Running
  http://issues.civicrm.org/jira/browse/CRM-12376
Merge pull request #473 from dlobo/CRM-12376

CRM-12376
Merge pull request #472 from dlobo/CRM-12373

CRM-12373
Merge pull request #471 from colemanw/communityMessagesUrl

Add community messages enabled/disabled to pingback stats CRM-12375