sending metric value as string

[keybod]

Hi~

I found that gmetric4j always send a metric as string but the type that is included in the metadata show actual data type such as double, long.
you can see the code at here: https://github.com/ganglia/gmetric4j/blob/master/src/main/java/info/ganglia/gmetric4j/gmetric/Protocolv31x.java#L138

Is there any reason for do that?