remove obsolete code; move artwork into artwork directory

--HG--
rename : client/chrome/content/personas-logo.jpg => artwork/personas-logo.jpg
rename : client/chrome/content/personas_24x24.png => artwork/personas_24x24.png

client/chrome/content/imageLoader.xul

@@ -1,47 +0,0 @@
-<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
-        flex="1"
-        style="background-repeat: no-repeat;"
-        onload="document.documentElement.style.backgroundImage = 'url(' + escapeCSSURL(gURL) + ')'">
-
-  <!-- WARNING: this is a chrome-privileged document when loaded from a chrome:
-     - URL, so you should only ever use it to load local images that the user
-     - has selected for a custom persona.  All remote images and images that the
-     - user has not personally selected should be loaded via the non-privileged
-     - loader hardcoded into nsPersonaService.js.
-     -->
-
-  <!-- Because CSS image loads don't block the load/pageshow events in Firefox 2,
-     - we load the image in an image tag, which does block those events, and then
-     - set the background-image property once the image has finished loading. -->
-  <image id="image" collapsed="true"/>
-
-  <script type="application/javascript">
-    <![CDATA[
-      // The URL of the image to load.  Defined below by the code that parses
-      // the URL parameters.
-      var gURL;
-
-      // Escape CSS special characters in unquoted URLs
-      // per http://www.w3.org/TR/CSS21/syndata.html#uri
-      function escapeCSSURL(aURLSpec) {
-        return aURLSpec.replace(/[(),\s'"]/g, "\$&");
-      }
-  
-      // Set the background properties specified by the URL.
-      let params = window.location.search.substr(1);
-      for each (let param in params.split("&")) {
-        let [name, value] = param.split("=");
-        value = decodeURIComponent(value);
-        switch(name) {
-          case "url":
-            gURL = value;
-            document.getElementById("image").setAttribute("src", gURL);
-            break;
-          case "position":
-            document.documentElement.style.backgroundPosition = value;
-            break;
-        }
-      }
-    ]]>
-  </script>
-</window>

client/chrome/content/personaLoader.xul

@@ -1,20 +0,0 @@
-<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
-        xmlns:xhtml="http://www.w3.org/1999/xhtml">
-
-  <!-- We specify the width and height very explicitly, particularly minwidth,
-     - since otherwise Gecko might resize each iframe to fit into the dimensions
-     - of the hidden window, and we want each iframe to be exactly the size
-     - we tell our persona authors to make their personas.
-     -->
-
-  <iframe id="headerIframe" type="content"
-          width="3000" minwidth="3000" maxwidth="3000"
-          height="200" minheight="200" maxheight="200"/>
-  <xhtml:canvas id="headerCanvas" width="3000" height="200"></xhtml:canvas>
-
-  <iframe id="footerIframe" type="content"
-          width="3000" minwidth="3000" maxwidth="3000"
-          height="100" minheight="100" maxheight="100"/>
-  <xhtml:canvas id="footerCanvas" width="3000" height="100"></xhtml:canvas>
-
-</window>