Berks cookbook misplaces files

When I run `berks cookbook nexus` from `~/Development/cookbook-development`, then the `.kitchen` and `.kitchen.yml` files are created in `cookbook-development`, but the `nexus` cookbook is created in the `nexus` folder.

![screen shot 2013-06-03 at 4 59 04 pm](https://f.cloud.github.com/assets/408570/602868/98a2b19a-cca9-11e2-88c4-710e106d26b2.png)

IIRC, they should all be inside the `nexus` directory.