added custom IntConverter to get around the mono bug

http://json.codeplex.com/workitem/24176

NzbDrone.Common/Serializer/IntConverter.cs

@@ -0,0 +1,39 @@
+using System;
+using Newtonsoft.Json;
+
+namespace NzbDrone.Common.Serializer
+{
+    public class IntConverter : JsonConverter
+    {
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            if (value == null)
+            {
+                writer.WriteNull();
+            }
+            else
+            {
+                writer.WriteValue(value);
+            }
+        }
+
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            if (!CanConvert(objectType))
+            {
+                throw new JsonSerializationException("Can't convert type " + existingValue.GetType().FullName + " to number");
+            }
+            if (objectType == typeof(Int64))
+            {
+                return Convert.ToInt64(reader.Value);
+            }
+
+            return Convert.ToInt32(reader.Value);
+        }
+
+        public override bool CanConvert(Type objectType)
+        {
+            return objectType == typeof(Int32) || objectType == typeof(Int64) || objectType == typeof(int);
+        }
+    }
+}