add testling

Makefile

@@ -28,7 +28,7 @@ test-travis:
 test-browser:
 	make build
 	node bin/generate-browser-test >dist/6to5-test.js
-	open test/browser/index.html
+	test -n "`which open`" && open test/browser/index.html
 
 build:
 	mkdir -p dist

README.md

@@ -23,7 +23,7 @@
 **6to5** turns ES6 code into vanilla ES5, so you can use ES6 features **today.**
 
  - **Fast** - no redundant code added so your compiled code is as fast as possible.
- - **Extensible** - with a large range of [plugins](#plugins) and browser support.
+ - **Extensible** - with a large range of [plugins](#plugins) and **browser support**.
  - **Lossless** - **source map support** so you can debug your compiled code with ease.
  - **Compact** - maps directly to the equivalent ES5 with **no runtime**.
  - **Concise** - does not pollute scope with unnecessary variables.
@@ -184,10 +184,14 @@ global `to5`.
 to5("class Test {}").code;
 ```
 
+#### Test
+
 To test 6to5 in your browser run:
 
     $ make test-browser
 
+[![Testling](https://ci.testling.com/sebmck/6to5.png)](https://ci.testling.com/sebmck/6to5)
+
 ## Modules
 
 6to5 modules compile straight to CommonJS, because of this various liberties are

package.json

@@ -36,6 +36,16 @@
     "bench": "make bench",
     "test": "make test"
   },
+  "testling": {
+    "harness": "mocha-tdd",
+    "preprocess": "make test-browser",
+    "html": "test/browser/index.html",
+    "browsers": [
+      "ie/8..latest",
+      "chrome/latest",
+      "firefox/latest"
+    ]
+  },
   "dependencies": {
     "ast-types": "0.5.0",
     "commander": "2.3.0",