added new tests for model mapping and serialization of the content display models. Started integrating trees. Committed the compiled

angular controllers, directives, services, resources since I'll be modifying them to work with the real data services. Then we'll have
to merge back to the belle repo with the changes.

src/Umbraco.Web/Trees/TreeQueryStringParameters.cs

@@ -0,0 +1,12 @@
+namespace Umbraco.Web.Trees
+{
+    /// <summary>
+    /// Common query string parameters used for tree query strings
+    /// </summary>
+    internal struct TreeQueryStringParameters
+    {
+        public const string DialogMode = "DialogMode";
+        public const string OnNodeClick = "OnNodeClick";
+        public const string RenderParent = "RenderParent";
+    }
+}