Improved support for model namespaces

I wanted Rails to support namespaced models even better that it does
today. So I wrote a patch that will make Rails generators support
namespaced models. You could e.g. script/generate scaffold Animal::Dog
and get fullly working (namepaced) web interface, test cases and
fixtures. I also changed the table name convention (e.g. animal_dog).

I wrote a blog entry and ticket (including the patch) to Rails
Lighthouse. Enjoy (the summer :slight_smile: