title: Footer in Liferay
body: <p>I need to make a footer in Liferay and use theme for it. What's the simpliest way to do it? </p>
  
  <p>I have created new theme, filled <code>_diffs</code> folder with other folders, but it's empty and I couldn't find relevant docs about this. Should I copy all basic files there? What should I change to create footer? </p>