Revert "fix undefined reference"

This reverts commit 7d65540123.

To restore functionality in convert.js

www/common/convert.js

@@ -1,14 +1,16 @@
 define([
+    '/common/virtual-dom.js',
     '/common/hyperjson.js',
     '/common/hyperscript.js'
-], function (hyperjson, hyperscript) {
+], function (vdom, hyperjson, hyperscript) {
     // complain if you don't find the required APIs
-    if (!(hyperjson && hyperscript)) { throw new Error(); }
+    if (!(vdom && hyperjson && hyperscript)) { throw new Error(); }
     
     // Generate a matrix of conversions
     /*
         convert.dom.to.hjson, convert.hjson.to.dom,
         convert.dom.to.vdom, convert.vdom.to.dom,
+        convert.vdom.to.hjson, convert.hjson.to.vdom
 
         and of course, identify functions in case you try to
         convert a datatype to itself
@@ -34,6 +36,15 @@ define([
                     vdom: function (H) {
                         return hyperjson.callOn(H, vdom.h);
                     }
+                },
+                vdom:{
+                    vdom: Self,
+                    dom: function (V) {
+                        return vdom.create(V);
+                    },
+                    hjson: function (V) {
+                        return hyperjson.fromDOM(vdom.create(V));
+                    }
                 }
             }, 
             convert = {};
@@ -44,6 +55,7 @@ define([
     }());
 
     convert.core = {
+        vdom: vdom,
         hyperjson: hyperjson,
         hyperscript: hyperscript
     };