Am I wrong or 3.0.0 is totally unusable?

If my `process.env.NODE_ENV` is `development`, loading this module using `babel-loader` will make `__DEV__` in `index.jsx` to `true`, and it enables every `this.shoud.xxx` check in the source.

Is there any way to avoid this? And could I get a reply about why tests are integrated with the source and fired under `NODE_ENV = development`, not `NODE_ENV = test`?
