add npm run test--html for debugging

.gitignore

@@ -1,3 +1,4 @@
 .DS_Store
 node_modules/
 dist/
+tests/scripts/index.html

package.json

@@ -5,6 +5,7 @@
   "main": "src/pjax.js",
   "scripts": {
     "test": "testling",
+    "test--html": "testling --html > tests/scripts/index.html",
     "coverage": "browserify -t coverify tests/**/*.js | testling | coverify"
   },
   "repository": {