Add a script for determining which DOM methods correspond to which HTML methods.

client/html/src/NodeWrappingImplementation.dart

Index: client/html/src/NodeWrappingImplementation.dart
diff --git a/client/html/src/NodeWrappingImplementation.dart b/client/html/src/NodeWrappingImplementation.dart
index 81c4a4a4d809caf2a1a217aedfeda046936785ea..e44f063d90561367ea38532a67d75f848a251d21 100644
--- a/client/html/src/NodeWrappingImplementation.dart
+++ b/client/html/src/NodeWrappingImplementation.dart
@@ -57,8 +57,9 @@ class _ChildrenNodeList implements NodeList {
     return false;
   }
 
+  /** @domName Node.hasChildNodes */
   bool isEmpty() {
-    return _node.hasChildNodes();
+    return !_node.hasChildNodes();
   }
 
   int get length() {
@@ -77,6 +78,7 @@ class _ChildrenNodeList implements NodeList {
      throw new UnsupportedOperationException('');
    }
 
+  /** @domName Node.appendChild */
   Node add(Node value) {
     _node.appendChild(LevelDom.unwrap(value));
     return value;
@@ -196,6 +198,7 @@ class NodeWrappingImplementation extends EventTargetWrappingImplementation imple
     return this;
   }
 
+  /** @domName contains */
   bool contains(Node otherNode) {
     // TODO: Feature detect and use built in.
     while (otherNode != null && otherNode != this) {