Since google_appengine isn't part of the uploaded trunk/app, there is no reason
why it couldn't be in a thirdparty directory, alongside mocker.
# Directions for web crawlers.
# See http://www.robotstxt.org/wc/norobots.html.
User-agent: HTTrack
User-agent: puf
User-agent: MSIECrawler
User-agent: Nutch
Disallow: /