Added public/javascripts/application.js as a sample since it'll automatically be included in javascript_include_tag :defaults [DHH] (backed out of -a/--with-assets, not worth it)

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3770 5ecf4fe2-1ee6-0310-87b1-e25e094e27de