title: Vim YouCompleteMe plugin - don't download clang
body: <p>I want to install and use the YouCompleteMe Plugin for Vim. However, a part of the installation implies downloading clang 3.7, which is already a part of my current Ubuntu installation. Generally, wasting space on multiple versions of the same application on my file system is something I disregard, but now I'm also running dual-boot and don't have that much space left for a "casual" downloaded copy of clang just to make use of this plugin.</p>
  
  <p>How can I make the YouCompleteMe to make use of the installation/libraries I already have, if possible at all?</p>
  
  <p>Thanks.</p>