Tracking Adjust Bounce Rate in Google Analytics

See http://analytics.blogspot.com.au/2012/07/tracking-adjusted-bounce-rate-in-google.html
Pointing out explicitly the default behaviour of HTTP Referrers
Numerous changes to the Referrer article
Typo pointed out via pull request from @nubs

Change was applied to smerity.github.com but needs to made downstream as
well. Thanks @nubs!