CRM-12550 avoid extraneous log_civicrm_email entries
Merge pull request #673 from eileenmcnaughton/4.3

CRM-12550 avoid extraneous log_civicrm_email entries
CRM-12549 - Restore upgrade message

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* CRM-12549: Upgrade isn't displaying $message on success.tpl
  http://issues.civicrm.org/jira/browse/CRM-12549
CRM_Core_Sessio - Doc tweak
Merge pull request #674 from totten/upgrade-messages

CRM-12549 - Restore upgrade message