title: Rails activerecord-reputation-system scope / query issue
body: <p>I'm implementing the <a href="https://github.com/twitter/activerecord-reputation-system" rel="nofollow">activerecord-reputation-system gem</a> and having an issue scoping the most 'loved' articles.</p>
  
  <pre><code>/articles_controller
  def index
    ....
    @loved_articles = Article.page(params[:page]).find_with_reputation(:votes, :all, {:order =&gt; 'votes DESC, created_at DESC'})
    ....
  end
  </code></pre>
  
  <p>I tried calling .per(5) after [:page]).per(5).... but rails gave me an "undefined method `per'" error</p>
  
  <pre><code>/article model
  
  def self.loved
    find_with_reputation(:votes, :all, {:order =&gt; 'votes DESC'}).first(5)
  end
  </code></pre>
  
  <p>-</p>
  
  <p>I would imagine calling .first(5) would scope it, but nothing is happening - in my views, the loop is just chewing through all my articles. Any ideas?</p>