Changed to use clojure 1.6.0 as it has clojure.walk bug fixed.
Added example text for optional query parameter with default value.
Fixed a typo.
Added example into working example service.
Removed a file added by mistake.
By internal chnages by clojure 1.5.x -> 1.6.0 lenfn is no longer returning
vector but a sequence. Sadly the test takes account the order of sequence
which was what was expected. Made the change to pass tests, as it is
questionable wether that test is even meaningful.
Merge pull request #13 from tomimas/master

An example for optional parameters usage.