title: Luarock fails to install new pacakages?
body: <p>I'm running the torch7 on a ubuntu 14.04 LTS pc behind a proxy.
  I have already made environment variables Http_proxy and proxy.</p>
  
  <p>The default options for <code>wget</code> and <code>curl</code> and <code>git</code> has been set to run via this proxy. here are the steps I used to change the settings of the packages of <a href="https://stackoverflow.com/questions/11211705/setting-proxy-in-wget">Wget proxy</a>, <a href="https://stackoverflow.com/questions/7559103/how-to-setup-curl-to-permanently-use-a-proxy">Curl proxy</a> &amp; <a href="https://stackoverflow.com/questions/783811/getting-git-to-work-with-a-proxy-server">git proxy</a></p>
  
  <p>The env variables are available in my <code>.bashrc</code> and <code>/etc/enviornment</code>files.</p>
  
  <p>I have also added the proxy in the config.lua file as per <a href="https://github.com/keplerproject/luarocks/wiki/LuaRocks-through-a-proxy" rel="nofollow noreferrer">this</a> post as well.</p>
  
  <p>The error I get when i try to install this is </p>
  
  <pre><code>$sudo luarocks install cunn
  Warning: Failed searching manifest: Failed loading manifest: 
  Failed fetching manifest for http://luarocks.org/repositories/rocks 
  - Error fetching file: Failed downloading 
  http://luarocks.org/repositories/rocks/manifest
  
  
  Error: No results matching query were found.
  </code></pre>