durafmt.go
func Parse(dinput time.Duration) *Durafmt {
	input := dinput.String()
	return &Durafmt{dinput, input, false}
}
func Parse(dinput time.Duration) *Durafmt {
	input := dinput.String()
	return &Durafmt{dinput, input, false}
}
// Parse creates a new *Durafmt struct, returns error if input is invalid.