counter.go
func (m *CirconusMetrics) IncrementByValue(metric string, val uint64) {
	m.Add(metric, val)
}
func (m *CirconusMetrics) IncrementByValue(metric string, val uint64) {
	m.Add(metric, val)
}
func ( m * CirconusMetrics ) IncrementByValue ( metric string , val uint64 ) { m . Add ( metric , val ) }
// IncrementByValue updates counter by supplied value
IncrementByValue updates counter by supplied value