auto increment ID.

model tables are automatically created.

NzbDrone.Core/Datastore/ModelBase.cs

@@ -1,10 +1,12 @@
 using System.Diagnostics;
+using ServiceStack.DataAnnotations;
 
 namespace NzbDrone.Core.Datastore
 {
     [DebuggerDisplay("{GetType()} ID = {Id}")]
     public abstract class ModelBase
     {
+        [AutoIncrement]
         public int Id { get; set; }
     }
 }