title: How to organise my files using CMake?
body: <p>I am having a bit of a problem with CMake regarding the organisation of my code within a solution.
  I have for an habit to organise my namespace by creating a directory for each.
  For example if I create something like this :</p>
  
  <pre><code>namespace test { namespace blabla  { ... } }
  </code></pre>
  
  <p>I would create a directory test and inside of it a directory blabla, however CMake does not make them appear in my Visual studio or Xcode project.</p>
  
  <p>Is there a trick to get it done ?</p>