stathat.go
func (r *BasicReporter) PostValue(statKey, userKey string, value float64) error {
	r.add(newClassicStatValue(statKey, userKey, value))
	return nil
}
func (r *BasicReporter) PostValue(statKey, userKey string, value float64) error {
	r.add(newClassicStatValue(statKey, userKey, value))
	return nil
}
// Using the classic API, posts a value to a stat.