Stream a JSON response from an http server. Useful for when restify doesn't send a content-type by default when you send a JSON stream through it... this does.
var jsr = require('json-stream-response');
function requestHandler(req, res, next) {
// ...
var ws = jsr(res);
ws.write(bigJSONThing);
ws.write(bigJSON2);
ws.end();
res.on('finish', next);
}