app/views/libraries/index.html.erb
<% content_for :sidebar do %>
<div class="panel panel-default">
<div class="panel-body">
<%= link_to 'Suggest a New Category', new_library_category_path, class: 'btn btn-default btn-md' %>
<%= link_to 'New Library', new_library_path, class: 'btn btn-default btn-md' %>
</div>
</div>
<% end %>
<h1>Libraries</h1>
<%= render 'library_categories/table' %>