Bundler doesn't import index.js if require is on a Directory

```
- Project
 \ _ Component
 \ _ index.js
 \ _ App.js
```

`App.js` is the entry point

``` js
// App.js
var Component = require('./Component');
```

doesn't import `index.js` automatically. Had to manually specify 

``` js
// App.js
var Component = require('./Component/index');
```
