Feature/carousel

Imported code from bootstrap for carousel, added require bootstrap.js and added carousel.js
<% Array.wrap(document["art_piece_photos_sms"]).each do |photo| %>
     <% if Array.wrap(document["art_piece_photos_sms"]).first == photo %>
            <div class="item active">
                  <%= image_tag photo %>
            </div>
            <% else %>
                <div class="item">
                  <%= image_tag photo %>
               </div>
        <% end %>
 <% end %>