title: I can't install and run ApiGen
body: <p>I'm creating a PHP micro-framework and decided to use ApiGen to generate the API.
  When I use the "apigen" command on terminal, I get the following message:</p>
  
  <blockquote>
    <p>sh.exe": apigen: command not found.</p>
  </blockquote>
  
  <p>Maybe it is the directory tree:</p>
  
  <pre><code>Project/
  --Libraries/
  ----Attw/ (micro-framework and the directory to document)
  ----apigen/
  </code></pre>
  
  <p>What can I do? How can I organize the directory tree? And how can I execute the apigen correctly? I haven't found good tutorials about that.</p>