Simple Forms and Twitter Bootstrap 3

I'm having a lot of problems getting Simple Forms to work with Twitter Bootstrap 3 in the build a simple Ruby application project. The closest I've been able to get to being correct is by adding the following initializer file to my simple forms initializers. I just added this file in with all the others. https://gist.github.com/tokenvolt/6599141

However I still can't get the field labels to show up on the left side of the field. Has anyone been able to figure out how to get this to work?

My _form.html.erb file is listed below. I changed the markup to reflect the simple form documentation and not what was shown in the video as they are different now. https://github.com/plataformatec/simple_form

<%= simple_form_for @status, defaults: { input_html: { class: 'form-horizontal' } } do |f| %>
  <% if @status.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@status.errors.count, "error") %> prohibited this status from being saved:</h2>

      <ul>
      <% @status.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <%= f.input :content %>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>