ref-clojure version was out to date compare to ref core.
fix english
support clojure-1.5
add default ref_clojure_precode to be able to use find-doc on the latest version of clojure
ref's each module has different version. ref-clojure was 0.1.0 and now it's 0.1.1
Merge pull request #32 from ujihisa/master

ref-clojure didn't work on clojure version 1.5