Started converting content model mapping over to use AutoMapper to fix the composite tabs/properties. New unit tests for the mapping as well.

src/Umbraco.Core/Models/PropertyGroup.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Specialized;
+using System.Diagnostics;
 using System.Reflection;
 using System.Runtime.Serialization;
 using Umbraco.Core.Models.EntityBase;
@@ -12,6 +13,7 @@ namespace Umbraco.Core.Models
     /// </summary>
     [Serializable]
     [DataContract(IsReference = true)]
+    [DebuggerDisplay("Id: {Id}, Name: {Name}")]
     public class PropertyGroup : Entity, IEquatable<PropertyGroup>
     {
         private string _name;