MATCH-67: CLJS support regression

syntax for try/catch in ClojureScript chagned to match clojure. We can
no longer catch 0 since `0 instanceof Number` is false in
JavaScript. We now catch a preallocated Error just like we do in
Clojure proper. Users must now include `clojure.core.match` namespace as
well as requiring the macros files.

Started adding tests so we can notice ClojureScript regression sooner.

project.clj

@@ -11,19 +11,19 @@
 
   :dependencies [[org.clojure/clojure "1.4.0"]
                  [org.clojure/clojurescript "0.0-1576"]]
-  :dev-dependencies [[nrepl "0.2.1"]]
+  :dev-dependencies [[org.clojure/tools.nrepl "0.2.1"]]
   :plugins [[lein-cljsbuild "0.3.0"]]
 
   :cljsbuild
   {:builds
    [{:id "test"
      :source-paths ["src/test/cljs"]
-     :compiler {:output-js "test.js"
+     :compiler {:output-to "test.js"
                 :pretty-print true
                 :static-fns true
                 :optimizations :simple}}
     {:id "test-adv"
      :source-paths ["src/test/cljs"]
-     :compiler {:output-js "test-adv.js"
+     :compiler {:output-to "test-adv.js"
                 :pretty-print true
                 :optimizations :advanced}}]})

src/main/clojure/clojure/core/match.clj

@@ -79,7 +79,7 @@
 
 (defn backtrack-expr []
   (if *clojurescript*
-    `(throw 0)
+    `(throw clojure.core.match/backtrack)
     `(throw clojure.core.match/backtrack)))
 
 (defn warn [msg]
@@ -439,8 +439,8 @@
 
 (defn catch-error [& body]
   (if *clojurescript*
-    `(catch e#
-       (if (identical? e# 0)
+    `(catch js/Error e#
+       (if (identical? e# clojure.core.match/backtrack)
          (do
            ~@body)
          (throw e#)))

src/main/clojure/clojure/core/match.cljs

@@ -0,0 +1,3 @@
+(ns clojure.core.match)
+
+(def backtrack (js/Error.))

src/test/cljs/clojure/core/match/js/tests.cljs

@@ -1,5 +1,6 @@
 (ns clojure.core.match.js.tests
-  (:use-macros [clojure.core.match.js :only [match]]))
+  (:use-macros [clojure.core.match.js :only [match]])
+  (:require [clojure.core.match]))
 
 (defn js-print [& args]
   (if (js* "typeof console != 'undefined'")