title: How do I modify gitstats to only utilize a specified file extension for its statistics?
body: <p>The website of the statistics generator in question is:</p>
  
  <pre><code>http://gitstats.sourceforge.net/
  </code></pre>
  
  <p>Its git repository can be cloned from:</p>
  
  <pre><code>git clone git://repo.or.cz/gitstats.git
  </code></pre>
  
  <p>What I want to do is something like:</p>
  
  <pre><code>./gitstatus --ext=".py" /input/foo /output/bar
  </code></pre>
  
  <p>Failing being able to easily pass the above option without heavy modification, I'd just hard-code the file extension I want to be included.</p>
  
  <p>However, I'm unsure of the relevant section of code to modify and even if I did know, I'm unsure of how to start such modifications.</p>
  
  <p>It's seems like it'd be rather simple but alas...</p>