import paths in Windows

The following works in Linux:

```
module App
import "utils/helpers.js" @as helper
import "utils/ses.js" @as ses
```

However, for Windows, user has to change to paths:

```
module App
import "utils\helpers.js" @as helper
import "utils\ses.js" @as ses
```

Need to make it consistent across platforms by making Linux paths work everywhere.