app/views/layouts/application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>catbook</title>
<%= csrf_meta_tags %>
<%= stylesheet_link_tag 'application', media: 'all' %>
<%= javascript_include_tag 'application' %>
<%= favicon_link_tag asset_path('paw.png') %>
</head>
<body>
<p class="notice"><%= notice %></p>
<p class="alert"><%= alert %></p>
<ul>
<li><a href='/'><i class="fa fa-paw fa-lg"></i></a></li>
<% if user_signed_in? %>
<li><%= link_to('Logout', destroy_user_session_path, method: :delete) %></li>
<li><a href=<%= user_page_path(current_user)%>><%= current_user.email %></a></li>
<% else %>
<li><%= link_to('Login', new_user_session_path) %></li>
<li><%= link_to "Sign Up", new_user_registration_path %></li>
<% end %>
</ul>
<%= yield %>
</body>
</html>