title: Rails4 issue with serving vendor assets (images)
body: <p>I recently upgraded to Rails4 and I have issues with precompiling image assets in the vendor folder. I know that vendor/assets folder was removed from compiling by default.</p>
  
  <p>I added vendor/assets/* folder to assets.precompile configuration, which gets assets precompiled, but my app won't display the images that are under vendor/assets/images folder. It appears that image paths in that folder are rendered on production, but with a wrong hash postfix.</p>
  
  <pre><code>config.assets.precompile += [ 'themes/*', 'jquery.fancybox.css', 'vendor/assets/*' ]
  </code></pre>
  
  <p>The Rails4 documentation for handling this issue is really poor. I don't want to move files from vendor/assets to app/assets as I like to have my and foreign files separated.</p>
  
  <p>My question is: what should I do to fix serving vendor images on production?</p>
  
  <p>Thanks for help</p>