Completely HTML-ize help transforms. Add intentionally undocumented :exporthelp.

vimperator/content/config.js

@@ -155,20 +155,6 @@ const config = { //{{{
         ////////////////////// STYLES //////////////////////////////////////////////////
         /////////////////////////////////////////////////////////////////////////////{{{
 
-        let img = Image();
-        img.src = "chrome://vimperator/content/logo.png";
-        img.onload = function () {
-            styles.addSheet(true, "logo", "chrome://liberator/locale/*",
-                ".liberator-logo {" + <>
-                     display:    inline-block;
-                     background: url({img.src});
-                     width:      {img.width}px;
-                     height:     {img.height}px;
-                </> + "}",
-                true);
-            delete img;
-        };
-
         /////////////////////////////////////////////////////////////////////////////}}}
         ////////////////////// MAPPINGS ////////////////////////////////////////////////
         /////////////////////////////////////////////////////////////////////////////{{{

vimperator/locale/en-US/intro.xml

@@ -9,8 +9,6 @@
     xmlns="http://vimperator.org/namespaces/liberator"
     xmlns:html="http://www.w3.org/1999/xhtml">
 
-<logo/>
-
 <html:p style="text-align: center; font-weight: bold;">
 First there was a Navigator, then there was an Explorer.
 Later it was time for a Konqueror. Now it's time for an Imperator, the
@@ -152,6 +150,10 @@ web browser, as key bindings differ according to which mode you are in.
         <link topic="various">Various commands</link>:
         Other help which didn't fit into any other category.
     </li>
+    <li>
+        <link topic="plugins">Plugins</link>:
+        Documentation for any plugins you may have installed.
+    </li>
     <li>
         <link topic="index">Index</link>:
         An index of all commands and options.