server_groups.go
func (c *Client) CreateServerGroup(newServerGroup *ServerGroupOptions) (*ServerGroup, error) {
	group := new(ServerGroup)
	_, err := c.MakeApiRequest("POST", "/1.0/server_groups", newServerGroup, &group)
	if err != nil {
		return nil, err
	}
	return group, nil
}
func (c *Client) CreateServerGroup(newServerGroup *ServerGroupOptions) (*ServerGroup, error) {
	group := new(ServerGroup)
	_, err := c.MakeApiRequest("POST", "/1.0/server_groups", newServerGroup, &group)
	if err != nil {
		return nil, err
	}
	return group, nil
}
// CreateServerGroup creates a new server group
//
// It takes an instance of ServerGroupOptions. Not all attributes can be
// specified at create time (such as Id, which is allocated for you).