Updated to include Browser-only performance tracking. See https://github.com/GigaOM/go-newrelic/pull/16 for the big change. See all changes in https://github.com/GigaOM/go-newrelic/compare/5d64ab93db8e6a689c913296ce87909be56a979e...70f586b3341ce75a148050e1a617088a90ff78ac.

git-svn-id: https://plugins.svn.wordpress.org/go-newrelic/trunk@1019569 b8457f37-d9ea-0310-8a92-e5e31aec5664