plugin directory contents not included when using git

If you create a new rails project, then clone the git repository for restful authentication into the vendor plugins directory, a git add will not add the contents of the directory since it seems to be it's own git repository.

mkdir authtest
cd authtest
rails .
git init
git add .
git commit -a -m "initial commit"
cd vendor/plugins
git clone git://github.com/technoweenie/restful-authentication.git restful_authentication
cd ../../
script/generate authenticated user sessions --include-activation --aasm
git add .
git status

Output of the status command ...snip...

#       new file:   vendor/plugins/restful_authentication
#

It will add the directory, but not the contents. When you the commit and push the repository elsewhere, it will not include the contents of the restful_authentication directory, which will lead to errors when trying to deploy the project.

I just deleted the .git directory in vendor/plugins/restful_authentication which allowed me to add the files, but there might (should) be a better way.

This may not be a bug with the plugin itself, but the installation instructions need to be updated to account for this issue.