add samples/repl/repl.clj to simplify browser REPL testing

Author: swannodette

samples/repl/repl.clj

@@ -0,0 +1,9 @@
+(require '[cljs.closure :as cljsc])
+(require '[cljs.repl :as repl])
+(require '[cljs.repl.browser :as brepl])
+
+(repl/repl
+  (brepl/repl-env)
+  :init (fn []
+          (cljsc/build "src" {:output-to "main.js"}))
+  :repl-verbose true)