Support statsd

[Sedward]

We've been running fabio and we would like the ability to output our metrics to a running statsd server. I don't see it requested anywhere else but I think it would be useful for others eventually.

[magiconair]

As long as this is supported by the gometrics library I'm using it should only be a matter of configuration.

[magiconair]

Unfortunately, the github.com/rcrowley/go-metrics does not have a statsd reporter but their architecture is pluggable. You can write one...

[magiconair]

Jordan Shaw from PubNub sent PR #139 to fix this. Thank you and closing.