title: Sinatra-Assetpack not serving js files
body: <p>This should be pretty easy, but it's simply not working. Running Padrino with sinatra-assetpack. All css files serve perfectly like this:</p>
  
  <pre><code>serve '/stylesheets', from: '/app/stylesheets'
  css :shared, [
    '/stylesheets/reset.css',
    '/stylesheets/runemadsen.css'
  ]
  </code></pre>
  
  <p>But when trying to serve .js files, it doesn't work. I get a 404 in the script load:</p>
  
  <pre><code>serve '/javascripts', from: '/app/javascripts'
  js :shared, [
    '/javascripts/jquery.js'
  ]
  </code></pre>
  
  <p>I really don't get it. It's exactly the same code. The files are there. Any tips?</p>