Deprecation: remove components from controller paths.  Canonicalize RAILS_ROOT by using File.expand_path on Windows, which doesn't have to worry about symlinks, and Pathname#realpath elsewhere, which respects symlinks in relative paths but is incompatible with Windows. Closes #6755.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6445 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

Added an omnipresent RailsInfoController with a properties action that delivers an HTML rendering of Rails::Info (but only when local_request? is true). Added a new default index.html which fetches this with Ajax.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2933 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2607 5ecf4fe2-1ee6-0310-87b1-e25e094e27de