Error "Failed to generate fake for module..." when "data-main" is used on <script>

This plugin is great, but it stops working when require.js app is bootstraped by `data-main` attribute of `<script src="require.js">` tag. I can provide minimal example demonstrating issue, just ask.

I compiled `isolate.coffe` with `coffee` console command (v1.6.3) like this:

``` bash
coffee -c -b -o src/vendor/isolate/src src/vendor/isolate/src/isolate.coffee
```
