Feature/carousel

Imported code from bootstrap for carousel, added require bootstrap.js and added carousel.js
what about:

delete -->    <% if Array.wrap(document["art_piece_photos_sms"]).length > 1 %>
<% Array.wrap(document["art_piece_photos_sms"]).each do |photo| %>
<% @first = (photo == Array.wrap(document["art_piece_photos_sms"]).first)
if @first
unless @first
<%= image_tag photo %>
<% end %>