downtimes.go
func (client *Client) UpdateDowntime(downtime *Downtime) error {
	return client.doJsonRequest("PUT", fmt.Sprintf("/v1/downtime/%d", *downtime.Id),
		downtime, nil)
}
func (client *Client) UpdateDowntime(downtime *Downtime) error {
	return client.doJsonRequest("PUT", fmt.Sprintf("/v1/downtime/%d", *downtime.Id),
		downtime, nil)
}
// UpdateDowntime takes a downtime that was previously retrieved through some method
// and sends it back to the server.