Raynos/send-data — pull request #14 by Raynos (2014-08-19 22:39:30+00:00)
Title: better json printer

We ran into an issue with `require('json-stringify-safe')`
and how its circular json serializing is naive.

In fact when sending an object as JSON we should error
on a circular structure instead.

cc @sh1mmer @Matt-Esch @dnathe4th