Adding some of the database changes that is part of v6 - just renaming a few columns so far.

Refactoring the installer, which is not working 100% yet.

src/Umbraco.Core/Models/Rdbms/ContentTypeDto.cs

@@ -43,6 +43,11 @@ namespace Umbraco.Core.Models.Rdbms
         [Constraint(Default = "0")]
         public bool AllowAtRoot { get; set; }
 
+        [Column("masterContentType")]
+        [Constraint(Default = "0")]
+        [NullSetting(NullSetting = NullSettings.Null)]
+        public int MasterContentType { get; set; }//TODO Delete once "masterContentType" has been removed from the Core
+
         [ResultColumn]
         public NodeDto NodeDto { get; set; }
     }