Upgraded to Rails 4.0.0.
Removed the README.rdoc and doc/README_FOR_APP template stubs since the Rails 4.0.0 defaults are better.
Removed deletion of the public/index.html since it is no longer provided in Rails 4.0.0.
Removed the :assets group from the Gemfile.
Added the doc asset group.
Added media: 'all' to application.html.erb layout.