title: Smart code completion in Qt Creator
body: <p>Is Qt Creator present smart code completion like Intellij IDEA? For example:</p>
  
  <pre><code>void main() {
      QString simpleVariableName = "First string";
      QString anotherVariableName = "Second string";
      // If I type "variable" and press Ctrl + Space I would like to get 
      // all matching variables(simple and another) in popup list. In 
      // IDEA it works, but Qt Creator show nothing.
  }
  </code></pre>
  
  <p>I heard aboud Clang Code Model plugin and it's already installed in my 3.4.0 version. But it make no sense, I still have a default behaviour.</p>
  
  <p>Is there any way to get really smart code completion?</p>