resources :changesets, :only => [:index, :create]
resources :changesets, :path => "changeset", :id => /\d+/, :only => [:show, :update] do
resource :download, :module => :changesets, :only => :show
resources :changesets, :only => [:index, :create]
resources :changesets, :path => "changeset", :id => /\d+/, :only => [:show, :update] do
resource :download, :module => :changesets, :only => :show