code: func (F *Frisby) SetCookies(cookies map[string]string) *Frisby {
  	if F.Req.Cookies == nil {
  		F.Req.Cookies = make(map[string]string)
  	}
  	for key, value := range cookies {
  		F.Req.Cookies[key] = value
  	}
  	return F
  }
docs: // Set several Cookie values for the coming request