Updated NH, Code Refactoring, made all DB transactions atomic.

Must use the Repositories with Using or else bad things will happen.

Tanshu.Accounts.Repository/Lifetime/Session.cs

@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using Tanshu.Accounts.Contracts;
-using System.Configuration;
+using System.Collections.Generic;
 using Tanshu.Accounts.Entities.Auth;
 using Tanshu.Accounts.Repository;