<%= stylesheet_link_tag "application", :media => "all" %> <%= javascript_include_tag "application" %> <%= csrf_meta_tags %> <%= content_tag :div, class: authenticated? ? "main authenticated" : "main unauthenticated" do %>

<%= link_to "metamap", root_path %>

 beta <% unless authenticated? %> <% end %> <% if authenticated? %> <% end %>
<%= yield %>