title: node.js: fixing ev_ref/ev_unref warning
body: <p>I have a <a href="https://github.com/quartzjer/node-sqlite-fts" rel="nofollow">Node.JS extension</a> that's causing warnings in Node.JS 0.8.4:</p>
  
  <pre><code>WARNING: ev_ref is deprecated, use uv_ref
  WARNING: ev_unref is deprecated, use uv_unref
  </code></pre>
  
  <p>I'd like to patch the extension to avoid these warnings but I can't find any information on ev_ref/uv_ref. </p>
  
  <p>The warning is probably caused by lines like these:</p>
  
  <pre><code>  ev_ref(EV_DEFAULT_UC);
    ev_unref(EV_DEFAULT_UC);
  </code></pre>
  
  <p>(no other variants found).</p>
  
  <p>What's the equivalent uv_[un]ref() call and are there any compatibility issues I should know?</p>