Fixed: do not send season images in json requests for series

This can save a significant amount of data on the wire, for something never used

src/NzbDrone.Api/NzbDrone.Api.csproj

@@ -166,6 +166,7 @@
     <Compile Include="Mapping\ResourceMappingException.cs" />
     <Compile Include="Mapping\ValueInjectorExtensions.cs" />
     <Compile Include="Series\AlternateTitleResource.cs" />
+    <Compile Include="Series\SeasonResource.cs" />
     <Compile Include="System\Backup\BackupModule.cs" />
     <Compile Include="System\Backup\BackupResource.cs" />
     <Compile Include="Update\UpdateResource.cs" />

src/NzbDrone.Api/Series/SeasonResource.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace NzbDrone.Api.Series
+{
+    public class SeasonResource
+    {
+        public int SeasonNumber { get; set; }
+        public Boolean Monitored { get; set; }
+    }
+}

src/NzbDrone.Api/Series/SeriesResource.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using Newtonsoft.Json;
 using NzbDrone.Api.REST;
 using NzbDrone.Core.MediaCover;
 using NzbDrone.Core.Tv;
@@ -40,7 +41,7 @@ namespace NzbDrone.Api.Series
         public List<MediaCover> Images { get; set; }
 
         public String RemotePoster { get; set; }
-        public List<Season> Seasons { get; set; }
+        public List<SeasonResource> Seasons { get; set; }
         public Int32 Year { get; set; }
 
         //View & Edit