generator generates config.rb with deprecated code

[glennr]

[2012/06/08 16:08:15][warning] ConfigurationError: [DEPRECATION WARNING]
[2012/06/08 16:08:15][warning] Backup::Configuration::Storage::S3.defaults is being deprecated.
[2012/06/08 16:08:15][warning] To set pre-configured defaults for Backup::Storage::S3, use:
[2012/06/08 16:08:15][warning] Backup::Storage::S3.defaults

[ghost]

I created a patch (#308) to comment those, since they were creating a dependency on fog and really should just be examples. Funny I didn't even notice this :) I've updated that pull request.