CRM-13620 - Change the check_permission function for frontend to reflect that we can now use standard permission checking against admin-configured frontend permissions.

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* CRM-13620: WordPress frontend permission have hard-coded paths which prevents new paths introduced by extensions from working
  http://issues.civicrm.org/jira/browse/CRM-13620
Merge pull request #26 from davecivicrm/CRM-13620

CRM-13620 - Change the check_permission function for frontend to reflect...