lib/ext_json.js
function deserialize(ejson, options) {
  options = options || {};
  return parse(JSON.stringify(ejson), options);
}
function deserialize(ejson, options) {
  options = options || {};
  return parse(JSON.stringify(ejson), options);
}
Deserializes an Extended JSON object into a plain JavaScript object with native/BSON types

@param {object} ejson The Extended JSON object to deserialize
@param {object} [options] Optional settings passed to the parse method
@return {object}