Merge pull request #10 from AlexandreBeaulne/dev

prodding + hearbeats
Merge pull request #11 from AlexandreBeaulne/dev

reset the start time for StatsD latency properly
Merge pull request #12 from AlexandreBeaulne/dev

now measuring both time when data comes in and when data goes out
changed the names of statsd latency keys to avoid wildcard confusion. increased the sampling rate to reduce the noise of measurments