worked on CRM-12285, udpate CMS email if primary email of contact is updated.

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* CRM-12285: Editing an email using the 'inscreen' edit option does not update the drupal user email, where the email is used for the uf_match
  http://issues.civicrm.org/jira/browse/CRM-12285
Merge pull request #437 from kurund/updateCMSEmail

worked on CRM-12285, udpate CMS email if primary email of contact is upd...