Merge pull request #6 from glenjamin/master

Use ring-codec for form encoding
Use deterministic order of hashes in tests

This ensures consistent output across different clojure versions
Also added leiningen profiles for 1.3, 1.4 and 1.5
Merge pull request #7 from glenjamin/multi-version-tests

Use deterministic order of hashes in tests
Updated Codox to 0.6.4
Released 0.1.4
Fix for specifying querystring without extra params

The bug was introduced in the move to ring-codec as the nil
behaviour differed in form-encode