Modifies default avatar image.

avatar.js

         }
         return 'https://www.gravatar.com/avatar/' +
             MD5.hexdigest(id.trim().toLowerCase()) +
-            "?d=retro&size=" + (size || "30");
+            "?d=wavatar&size=" + (size || "30");
     }
 
     return my;

contact_list.js

     function createAvatar(id) {
         var avatar = document.createElement('img');
         avatar.className = "icon-avatar avatar";
-        avatar.src = "https://www.gravatar.com/avatar/" + id + "?d=retro&size=30";
+        avatar.src = "https://www.gravatar.com/avatar/" + id + "?d=wavatar&size=30";
 
         return avatar;
     }

index.html

     <script src="app.js?v=22"></script><!-- application logic -->
     <script src="commands.js?v=1"></script><!-- application logic -->
     <script src="chat.js?v=15"></script><!-- chat logic -->
-    <script src="contact_list.js?v=7"></script><!-- contact list logic -->
+    <script src="contact_list.js?v=8"></script><!-- contact list logic -->
     <script src="side_panel_toggler.js?v=1"></script>
     <script src="util.js?v=7"></script><!-- utility functions -->
     <script src="etherpad.js?v=10"></script><!-- etherpad plugin -->
     <script src="message_handler.js?v=2"></script>
     <script src="api_connector.js?v=2"></script>
     <script src="settings_menu.js?v=1"></script>
-    <script src="avatar.js?v=3"></script><!-- avatars -->
+    <script src="avatar.js?v=4"></script><!-- avatars -->
     <link rel="stylesheet" href="css/font.css?v=6"/>
     <link rel="stylesheet" href="css/toastr.css?v=1">
     <link rel="stylesheet" type="text/css" media="screen" href="css/main.css?v=30"/>
         </div>
         <div id="settingsmenu" class="right-panel">
             <div class="icon-settings"> SETTINGS</div>
-            <img id="avatar" src="https://www.gravatar.com/avatar/87291c37c25be69a072a4514931b1749?d=retro&size=30"/>
+            <img id="avatar" src="https://www.gravatar.com/avatar/87291c37c25be69a072a4514931b1749?d=wavatar&size=30"/>
             <div class="arrow-up"></div>
             <input type="text" id="setDisplayName" placeholder="Name">
             <input type="text" id="setEmail" placeholder="E-Mail">