Add contributor file.
Add contributor file.

wujf/appengine-nodejs-quickstart,googlearchive/appengine-nodejs-quickstart,johnschimmel/appengine-nodejs-quickstart,johnschimmel/appengine-nodejs-quickstart,googlearchive/appengine-nodejs-quickstart,jonparrott/appengine-nodejs-quickstart,jonparrott/appengine-nodejs-quickstart