Benp/new relic s3 agent

@mulby @brianhw @e0d

Even if we end up going with a different solution, this would be the first we roll out with. Please have a look?


Looks like it does. I haven't had a look....
http://docs.aws.amazon.com/AWSSdkDocsRuby/latest/DeveloperGuide/ruby-dg-roles.html