Merge pull request #141 from jbnicolai/verify-build-artifacts-are-commited

Include test asserting all generated build changes are commited.

package.json

@@ -28,6 +28,6 @@
   },
   "private": true,
   "scripts": {
-    "test": "gulp"
+    "test": "gulp && git status | grep 'working directory clean' >/dev/null || (echo 'Please commit all changes generated by building'; exit 1)"
   }
 }