resp.go
func (r *Resp) PrintHeaders() {
	for key, value := range r.Headers {
		fmt.Println(key, " : ", value[0])
	}

}
func (r *Resp) PrintHeaders() {
	for key, value := range r.Headers {
		fmt.Println(key, " : ", value[0])
	}

}
// PrintHeaders prints the http headers as k,v pairs