Moves XNA 4 files for Github migration.

Plan B Html Parser/Nodes/HtmlDivNode.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace PlanB.Html.Nodes
+{
+    public class HtmlDivNode: HtmlNode
+    {
+        public static string StaticTagName { get { return "div"; } }
+        public override string TagName { get { return StaticTagName; } }
+    }
+}