rcrowley/go-metrics — pull request #58 by stuartcarnie (2014-06-06 19:48:42+00:00)
Title: Added JSON->io.Writer; consistent ordering to WriteOnce

* Added `WriteJSONOnce` API to output JSON to `io.Writer`
* Ensure `WriteOnce` outputs in a consistent order
* go 1.3 map ordering is no longer consistent for small maps per the [release notes](http://tip.golang.org/doc/go1.3#map)