title: gem install rails -v 4.1.0 stuck with ri-documentation
body: <p>I've run <code>gem install rails -v 4.1.0</code> on my server, but somehow it's stuck with </p>
  
  <pre><code>Parsing documentation for rails-4.1.0 
  Installing ri documentation for rails-4.1.0
  </code></pre>
  
  <p>Can I abort this? What do I need the ri documentation for? Is it really required?</p>