Setup testling

package.json

@@ -4,7 +4,7 @@
   "description": "Easily enable fast Ajax navigation on any website (using pushState +  xhr)",
   "main": "src/pjax.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "testling"
   },
   "repository": {
     "type": "git",
@@ -47,5 +47,18 @@
     "rimraf": "^2.2.6",
     "tape": "^2.12.3",
     "uglifyify": "^2.1.1"
+  },
+  "testling": {
+    "files": "tests/**/*.js",
+    "browsers": [
+      "ie/7..latest",
+      "chrome/22..latest",
+      "firefox/16..latest",
+      "safari/6..latest",
+      "opera/11.0..latest",
+      "iphone/6..latest",
+      "ipad/6..latest",
+      "android-browser/latest"
+    ]
   }
 }