Add sharing diagram with attribution.

copyright.html

@@ -59,7 +59,9 @@
 
           <p>The server icon was created by <a href="http://www.visualpharm.com/" rel="noopener noreferrer" target="_blank">VisualPharm</a>.</p>
 
-          <p>All other content on this website is (c) 2018 Sublime Software Ltd. You can redistribute and modify it under the terms of the <a href="https://creativecommons.org/licenses/by/4.0" rel="noopener noreferrer" target="_blank">Creative Commons 4.0 Attribution License</a>.</p>
+          <p>The diagram of sharing data with Briar via Wi-Fi, Bluetooth and Internet was created by the Open Technology Fund's <a href="https://www.opentech.fund/labs/localization-lab/" rel="noopener noreferrer" target="_blank">Localization Lab</a>.</p>
+
+          <p>All other content on this website is (c) 2019 Sublime Software Ltd. You can redistribute and modify it under the terms of the <a href="https://creativecommons.org/licenses/by/4.0" rel="noopener noreferrer" target="_blank">Creative Commons 4.0 Attribution License</a>.</p>
 
         </div> <!-- full -->
       </div> <!-- content -->

how-it-works.html

@@ -74,6 +74,11 @@ prevent surveillance and censorship.</figcaption>
             <figcaption>Typical messaging software relies on central servers and exposes messages and relationships to surveillance.</figcaption>
           </figure>
 
+         <figure>
+           <img src="img/diagram_sharing.png" class="" alt="Sharing data with Briar via Wi-Fi, Bluetooth and Internet"/>
+           <figcaption>Briar can share data via Wi-Fi, Bluetooth and the Internet.</figcaption>
+         </figure>
+
           <p>Briar provides private messaging, public forums and blogs that are protected against the following surveillance and censorship threats:</p>
 
           <ul>