[TH] pass stack trace across to parent and log it
[TH] add papertrail support

Deployment note: you will need to run 
`npm install`. You also need to configure the
config.log.papertrail section with host, port and
app name, see commented section in the sample
config.yml
[TH] add new relic support

Deployment notes: you’ll need to run `npm install`
to get the newrelic agent package installed. You
also need to take the newrelic.js.sample and make
a file called newrelic.js, with the license key
added. Without this file, newrelic is turned off
all together, so we can deploy without turning it
on.