clojure/data.json — pull request #10 by killme2008 (2013-03-20 14:59:11+00:00)
Title: Added pair-fn to transform both key and value

I have a requirement to transform both key and value at one time,so i added a pair-fn just like
value-fn,but it will replace both key and value to output.Please check the commit and test case.Thanks.