Update Clojure and ClojureScript to cljc compatible versions

This forces upgrades to lein-cljsbuild and austin
Also, with the update to lein-cljsbuild, :whitespace doesn't seem to be the
default optimization anymore so I set it manually.

project.clj

@@ -3,11 +3,11 @@
   :url "https://github.com/weavejester/reagi"
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}
-  :dependencies [[org.clojure/clojure "1.6.0"]
+  :dependencies [[org.clojure/clojure "1.7.0"]
                  [org.clojure/core.async "0.2.374"]
-                 [org.clojure/clojurescript "0.0-2202"]]
+                 [org.clojure/clojurescript "1.7.228"]]
   :plugins [[codox "0.6.7"]
-            [lein-cljsbuild "1.0.3"]
+            [lein-cljsbuild "1.1.2"]
             [com.keminglabs/cljx "0.3.2"]]
   :source-paths ["src/clojure" "src/cljs"]
   :test-paths ["test/clojure"]
@@ -22,17 +22,19 @@
   :codox {:sources ["target/classes"]}
   :cljsbuild
   {:builds [{:source-paths ["target/classes"]
-             :compiler {:output-to "target/main.js"}}]}
+             :compiler {:output-to "target/main.js"
+                        :optimizations :whitespace}}]}
   :profiles
-  {:dev  {:plugins [[com.cemerick/austin "0.1.4"]]
+  {:dev  {:plugins [[com.cemerick/austin "0.1.6"]]
           :dependencies [[criterium "0.4.2"]]
           :repl-options {:init (require '[reagi.core :as r]
                                         '[clojure.core.async
                                           :as a :refer [go go-loop <! >! <!! >!!]])}}
    :test {:plugins [[com.cemerick/clojurescript.test "0.3.0"]]
           :cljsbuild
           {:builds ^:replace [{:source-paths ["target/classes" "test/cljs"]
-                               :compiler {:output-to "target/test.js"}}]
+                               :compiler {:output-to "target/test.js"
+                                          :optimizations :whitespace}}]
            :test-commands {"unit-tests" ["phantomjs" :runner "target/test.js"]}}}}
   :aliases
   {"test-cljs" ["with-profile" "test" "cljsbuild" "test"]