title: Padrino + sinatra-assetpack not working
body: <p><br />
  I'm trying to combine Padrino with Sinatra-Assetpack, without success.</p>
  
  <p>This is my Gemfile:</p>
  
  <pre class="lang-rb prettyprint-override"><code>source :rubygems
  
  gem 'rake'
  gem 'sinatra-flash', :require =&gt; 'sinatra/flash'
  
  # Component requirements
  gem 'haml'
  
  # Assets requirements
  gem 'sinatra-assetpack', :require =&gt; 'sinatra/assetpack'
  
  # Test requirements
  
  # Padrino Stable Gem
  gem 'padrino', '0.10.6'
  </code></pre>
  
  <p>in my app/app.rb file I set:</p>
  
  <pre class="lang-rb prettyprint-override"><code>require 'sinatra/assetpack'
  
  class Coffee &lt; Padrino::Application
    register Padrino::Rendering
    register Padrino::Mailer
    register Padrino::Helpers
  
    register Sinatra::AssetPack
  
    assets {
      serve '/js',  from: '/app/assets/javascripts'
      serve '/css', from: '/app/assets/stylesheets'
  
      css :main, ['/css/main.css']
      js  :application, ['/js/application.js']
    }
  
    enable :sessions
  
  end
  </code></pre>
  
  <p>my javascript files are in /app/assets/javascripts and css files in /app/assets/stylesheets, but Padrino respond with a 404 for both /css/main.css and /js/application.js</p>
  
  <p>Any ideas?</p>
  
  <p>Thanks</p>