Updates to the board show to display conversations in the board

shows.html.erb

<h1 id="page_title"><%= @board.title %></h1>
<p id="notice"><%= notice %></p>
<%= link_to 'Rails Boards', boards_path %> &gt; <%= link_to @board.title, @board %> <br />

<table>
  <tr>
    <th>Post / Author</th>
    <th>Last Reply</th>
    <th>Number of Replies</th>
  </tr>
<% @board.conversations.each do |conversation| %>
  <tr>
    <td>
      <%= link_to conversation.title, board_conversation_path(:board_id => @board, :id => conversation) %><br />
      <%= conversation.user.username %>
    </td>
    <td>
      <%= conversation.comments.find(:last).created_at %><br />
      by <%= conversation.comments.find(:last).user.username %>
    </td>
    <td>
      <%= conversation.comments.count - 1%>
    </td>
  </tr>
<% end %>
</table>
    

<%= link_to 'Post New Message', new_board_conversation_url(@board) %>