anchor.diff: -<%= javascript_include_tag '/javascripts/users' %>
  +<%= javascript_include_tag '/javascripts/users', 'data-turbolinks-track' => true %>
   <div>
     <strong><%= link_to 'List of Projects', projects_path %></strong> <i class="fa fa-angle-double-right"></i>
     <strong><%= @project.title %></strong>
  
positive.code:   </div>
    <div id="doc-side-panel">
      <% if user_signed_in? %>
          <ul>
            <li><%= custom_css_btn 'edit', 'fa fa-pencil-square-o', edit_project_path(@project) %></li>
            <li><%= custom_css_btn 'new document', 'fa fa-file-text-o', new_project_document_path(project_id: @project.friendly_id) %></li>
            <li>
              <% if current_user.following?(@project) %>
                  <%= custom_css_btn 'leave project', 'fa fa-users', unfollow_project_path(@project) %>
                <li>
                  <div id="HOA-placeholder"></div>
                </li>
  
                <script src="https://apis.google.com/js/platform.js"></script>
                <script>
                    gapi.hangout.render('HOA-placeholder', {
                        'topic': '<%= @project.title%> - Pairing session',
                        'render': 'createhangout',
                        'hangout_type': 'onair',
                        'initial_apps': [
                            {'app_type': 'ROOM_APP' }
                        ],
                    });
                </script>
            <% else %>
                <%= custom_css_btn 'join project', 'fa fa-users', follow_project_path(@project) %>
            <% end %>
            </li>
          </ul>
      <% end %>
    </div>
  </div>
  
negative.code:       <div class="col-md-6">
          <ul class="listings">
            <% if @videos.empty? %>
              <p style="margin-top: 20px;">No videos in project <strong><%= @project.title %></strong></p>
            <% else %>
              <h2>List of Project videos</h2>
              <% @videos.each do |video| %>
                <li>
                  <%= video_link(video) %> - <i style="font-size: 85%; color: darkgray;">published: <%= video[:published] %></i>
                </li>
              <% end %>
            <% end %>
          </ul>
        </div>
        <div class="col-md-6">
          <% unless @videos.empty? %>
            <h4 id="video_contents"><%= @videos.first[:content] %></h4>
            <iframe id="ytplayer" type="text/html" width="340" height="210"
                    src="<%= video_embed_link(@videos.first) %>" frameborder="0"></iframe>
            </div>
          <% end %>
          </div>
    </div>
  