Fix failing api middleware test.

Not sure if it's right to throw a "bad gateway" error if the server is
returning 404, though, so I'd like this reviewed. This should fix #356.
Docs: add getting started section
Docs: starting the app server
Merge pull request #357 from toolness/issue-356

Fix failing api middleware test.
Merge pull request #359 from paulsmith/master

Getting started docs in README
Update README.md

adding link to copy doc
Add newrelic to app
Merge pull request #362 from mozilla/newrelic

Add newrelic to app