CRM-14991 CiviContribute: add sort by date to contrib detail report

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* CRM-14991: Sort contribution detail report by contribution date
  https://issues.civicrm.org/jira/browse/CRM-14991
Merge pull request #3671 from agh1/contrib-date-sort

CRM-14991 CiviContribute: add sort by date to contrib detail report