Don't skip-dev when getting deps in jar task.

Memoize: it's your friend!

src/leiningen/jar.clj

@@ -154,10 +154,11 @@
 well as the source .clj files. If project.clj contains a :main symbol, it will
 be used as the main-class for an executable jar."
   ([project jar-name]
-     (binding [compile/*silently* true]
+     (binding [compile/*silently* true
+               deps (memoize deps)]
        (when (zero? (compile/compile project))
          (let [jar-path (get-jar-filename project jar-name)
-               deps-fileset (deps project :skip-dev)]
+               deps-fileset (deps project)]
            (write-jar project jar-path (filespecs project deps-fileset))
            (println "Created" jar-path)
            jar-path))))