RFR: Upgrade statsd to 0.6

## Updated 7/8/2013

upgraded statsd to latest stable version.

Namespacing is now included in statsd 0.6 and rollups are done within the statsd core instead of in the backend.

When merged, we'll be using the stock Etsy StatsD implementation (excluding the <code>anotherGraphite.js</code> file, which differs by two lines (using a different host and port setting from the config file). I've made the namespacing the same between this and the rackspace 'ckdev' branch by changing the config file in this PR in the chef repo:

https://github.com/racker/chef/pull/1593