Persister.Entity namespace ported

- Tuplizers ready
- Others generated ID strategy ready
....
- many others H3.2.5 features ready to be active

BREAKING CHANGE:
- IInterceptor
- ISession
- IEntityPersister
- IType (ToColumnNullness is used instead IsDatabaseNull to manage multi-columns type)
- INullableUserType (unneeded)

Possible Breaking change:
- IBatcher
- IPostInsertIdentityPersister

SVN: trunk@3385

Author: fabiomaulo

src/NHibernate.DomainModel/CustomPersister.cs

@@ -50,9 +50,9 @@ public override object FromStringValue(string xml)
 			return NullableInt32.Parse(xml);
 		}
 
-		public override bool IsDatabaseNull(object value)
+		public override bool[] ToColumnNullness(object value, Engine.IMapping mapping)
 		{
-			return value == null || NullableInt32.Default.Equals(value);
+			return value == null || NullableInt32.Default.Equals(value) ? new bool[] { false } : new bool[] { true };
 		}
 	}
 }

src/NHibernate.DomainModel/NHSpecific/NullableInt32Type.cs

@@ -28,7 +28,7 @@ protected override void Configure(Configuration configuration)
 			configuration.SetProperty(Environment.GenerateStatistics, "true");
 		}
 
-		[Test, Ignore("Not supported yet.")]
+		[Test]
 		public void IdentityColumnGeneratedIds()
 		{
 			ISession s = OpenSession();