Upgrade dependencies

org.clojure/clojure 1.5.1 -> 1.6.0
org.clojure/clojurescript 0.0-2156 -> 0.0-2371
lein-cljsbuild 1.0.2 -> 1.0.3
com.keminglabs/cljx 0.3.2 -> 0.4.0