Merge ModelsBuilder in, NuGet dies on circ dependencies now

src/Umbraco.ModelsBuilder/ImplementPropertyTypeAttribute.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Umbraco.ModelsBuilder
+{
+    /// <summary>
+    /// Indicates that a property implements a given property alias.
+    /// </summary>
+    /// <remarks>And therefore it should not be generated.</remarks>
+    [AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
+    public sealed class ImplementPropertyTypeAttribute : Attribute
+    {
+        public ImplementPropertyTypeAttribute(string alias)
+        {
+            Alias = alias;
+        }
+
+        public string Alias { get; private set; }
+    }
+}