-- Fixed formatting and code fix for CRM-12694, removed mime_content_type since we have only 2 export format CSV and IIF and both have text/plain mime_content_type

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* CRM-12694: Eliminate/replace call to function mime_content_type()
  http://issues.civicrm.org/jira/browse/CRM-12694
Merge pull request #1313 from pradpnayak/CRM-12694

-- Fixed formatting and code fix for CRM-12694, removed mime_content_typ...