- Remove dead links and take users to just the home page instead

- Add new logo for guides header
[ci skip]

guides/source/layout.html.erb

@@ -24,20 +24,7 @@
   <% end %>
   <div id="topNav">
     <div class="wrapper">
-      <strong class="more-info-label">More at <a href="http://rubyonrails.org/">rubyonrails.org:</a> </strong>
-      <span class="red-button more-info-button">
-        More Ruby on Rails
-      </span>
-      <ul class="more-info-links s-hidden">
-        <li class="more-info"><a href="http://rubyonrails.org/">Overview</a></li>
-        <li class="more-info"><a href="http://rubyonrails.org/download">Download</a></li>
-        <li class="more-info"><a href="http://rubyonrails.org/deploy">Deploy</a></li>
-        <li class="more-info"><a href="https://github.com/rails/rails">Code</a></li>
-        <li class="more-info"><a href="http://rubyonrails.org/screencasts">Screencasts</a></li>
-        <li class="more-info"><a href="http://rubyonrails.org/documentation">Documentation</a></li>
-        <li class="more-info"><a href="http://rubyonrails.org/community">Community</a></li>
-        <li class="more-info"><a href="http://weblog.rubyonrails.org/">Blog</a></li>
-      </ul>
+      <strong class="more-info-label">←<a href="http://rubyonrails.org/">Back to rubyonrails.org:</a> </strong>
     </div>
   </div>
   <div id="header">