Statsd Admin interface

This statsd bug led me to finding the statsd admin interface on port 8126: https://github.com/etsy/statsd/issues/113 

Here's a class that implements the admin commands to list stats: stats, counters, timers, gauges
And the management commands: delcounters, deltimers, delgauges

I'm using it to clear out defunct ec2 servers from my statsd gauges.

Sorry, no unit tests or readme modifications :\