<?php
CRM_Core_Resources::singleton()
  ->addScriptFile('civicrm', 'packages/backbone/json2.js', 100, 'html-header', FALSE)
  ->addScriptFile('civicrm', 'packages/backbone/underscore.js', 110, 'html-header', FALSE)
  ->addScriptFile('civicrm', 'packages/backbone/backbone.js', 120, 'html-header')
  ->addScriptFile('civicrm', 'packages/backbone/backbone.modelbinder.js', 125, 'html-header', FALSE)
  ->addScriptFile('civicrm', 'js/crm.backbone.js', 130, 'html-header', FALSE);

// CRM_Core_Resources::singleton()->addScriptFile(...);
// CRM_Core_Resources::singleton()->addStyleFile(...);
// CRM_Core_Resources::singleton()->addSetting(...);