Add the famous Bill Gates quote

Dependencies

• [2] ARAFRHKU Create the outline of the talk
• [*] UH3YXOLF Start the slide deck

Change contents

• file addition: bill-gates-2004.jpg (----------)
  [4.1221]
• replacement in sections/1-preface.md at line 1
  [2.11858]→[2.11859:11868](∅→∅)
  − # Preface
  [2.11858]
  + <!-- .slide: data-background="img/background/bill-gates-2004.jpg" -->

  +

  + <blockquote class="explanation">

  + <em>"640K ought to be enough for anybody."</em>

  + </blockquote>

  +

  + <https://upload.wikimedia.org/wikipedia/commons/thumb/3/31/Bill_Gates_2004.jpg/1280px-Bill_Gates_2004.jpg> <!-- .element: class="attribution" -->

  +

  + ---

  +