Added local copy of gravatars to keep presentation intact even when gravatar changes

slides/2013/AnonymitaetImNetz/index.html

@@ -110,12 +110,12 @@
       <article>
         <h3>Die Netz-Identit&auml;t - Twitter</h3>
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-          <p style="text-align:center;"><img src="http://0.gravatar.com/avatar/a3bf0e7acc39439f771eee680193bec3?s=200" style="overflow: hidden; border-radius: 0.5em;" /></p>
+          <p style="text-align:center;"><img src="knut.jpg" style="overflow: hidden; border-radius: 0.5em;" /></p>
           <p style="font-weight: bold; text-align: center;">Knut</p>
           <p style="font-style: italic;">"Coder &amp; Sysadmin, working at @jimdo - See more Details at http://www.knut.mp/ and my other profiles or just ask."</p>
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         <div style="width: 48%; float: left; margin-left: 1%; margin-top: 2em;">
-          <p style="text-align:center;"><img src="http://0.gravatar.com/avatar/cb9d8b61e2897be021ab72b0c253245f?s=200" style="overflow: hidden; border-radius: 0.5em;" /></p>
+          <p style="text-align:center;"><img src="franzi.jpg" style="overflow: hidden; border-radius: 0.5em;" /></p>
           <p style="font-weight: bold; text-align: center;">Apfelkern</p>
           <p style="font-style: italic;">"Apfelkern, die. Freilandhaltung, bibliophil, kann Spuren von Roter Beete enthalten, 30 Grad Handwäsche."</p>
         </div>