Very basic goo.gl url shortener service API implementation.
No error handling implemented.
user=> (shorten "http://google.com")
"http://goo.gl/mR2d"
user=> (expand "http://goo.gl/mR2d")
"http://google.com/"
Copyright (C) 2010 zw0rk
Distributed under the Eclipse Public License, the same as Clojure.