Does not work with react-bootstrap

Simple test with react-bootstrap

https://github.com/EvanCarroll/debowerify-fail

``` text
$ sh FAIL.sh
Error: Cannot find module './joinClasses' from '/tmp/fail/public/bower_components/react-bootstrap'
at /usr/local/lib/node_modules/browserify/node_modules/resolve/lib/async.js:42:25
at load (/usr/local/lib/node_modules/browserify/node_modules/resolve/lib/async.js:60:43)
at /usr/local/lib/node_modules/browserify/node_modules/resolve/lib/async.js:66:22
at /usr/local/lib/node_modules/browserify/node_modules/resolve/lib/async.js:21:47
at Object.oncomplete (fs.js:93:15)
```

`react-bootstrap/index.js` has a series of requires

```
Accordion: require('./Accordion')
```

While the file, `./Acordion.js` has itself a series of requires.

```
var joinClasses = require('./utils/joinClasses');
```

These don't seem to be resolvable with `react-bootstrap`.