got basic relationships working

added support for embedded documents.

NzbDrone.Core/Datastore/EnumIntConverter.cs

@@ -0,0 +1,37 @@
+using System;
+using Marr.Data.Converters;
+using Marr.Data.Mapping;
+
+namespace NzbDrone.Core.Datastore
+{
+    public class EnumIntConverter : IConverter
+    {
+        public Type DbType
+        {
+            get
+            {
+                return typeof(int);
+            }
+        }
+
+        public object FromDB(ColumnMap map, object dbValue)
+        {
+            if (dbValue != null && dbValue != DBNull.Value)
+            {
+                return Enum.ToObject(map.FieldType, (Int64)dbValue);
+            }
+
+            return null;
+        }
+
+        public object ToDB(object clrValue)
+        {
+            if (clrValue != null)
+            {
+                return (int)clrValue;
+            }
+
+            return DBNull.Value;
+        }
+    }
+}