conjure

Is conjure-contrib.jar not standardized now?

This page introduces a lot of clojure libraries. And this page also comments to consider using the clojure-contrib. Why the clojure-contrib.jar is different in size? The leiningen's clojure-contrib-1.2.0-beta1.jar is 479.2KB in size, but the conjure-contrib.jar that I downloaded from Programming Clojure is 2.9MB. As I explained in here...