CRM-13608 - API - Support 'sequential' param with getoptions

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* CRM-13608: Api3 'getoptions' ordering doesn't work as JSON
  http://issues.civicrm.org/jira/browse/CRM-13608
Merge pull request #1817 from colemanw/4.4

CRM-13608 - API - Support 'sequential' param with getoptions