New: (Cardigann) Add season/episode fields

src/NzbDrone.Core/IndexerSearch/NewznabResults.cs

@@ -104,6 +104,8 @@ namespace NzbDrone.Core.IndexerSearch
                             GetNabElement("files", r.Files, protocol),
                             GetNabElement("grabs", r.Grabs, protocol),
                             GetNabElement("peers", t.Peers, protocol),
+                            GetNabElement("season", t.Season, protocol),
+                            GetNabElement("episode", RemoveInvalidXMLChars(r.Episode), protocol),
                             GetNabElement("author", RemoveInvalidXMLChars(r.Author), protocol),
                             GetNabElement("booktitle", RemoveInvalidXMLChars(r.BookTitle), protocol),
                             GetNabElement("artist", RemoveInvalidXMLChars(r.Artist), protocol),

src/NzbDrone.Core/Indexers/Definitions/Cardigann/CardigannParser.cs

@@ -644,6 +644,14 @@ namespace NzbDrone.Core.Indexers.Definitions.Cardigann
                     release.Year = ParseUtil.CoerceInt(value);
                     value = release.Year.ToString();
                     break;
+                case "season":
+                    release.Season = ParseUtil.CoerceInt(value);
+                    value = release.Season.ToString();
+                    break;
+                case "episode":
+                    release.Episode = value;
+                    value = release.Episode;
+                    break;
                 case "author":
                     release.Author = value;
                     break;

src/NzbDrone.Core/Parser/Model/ReleaseInfo.cs

@@ -36,6 +36,8 @@ namespace NzbDrone.Core.Parser.Model
         public int TvMazeId { get; set; }
         public int DoubanId { get; set; }
         public int Year { get; set; }
+        public int? Season { get; set; }
+        public string Episode { get; set; }
         public string Author { get; set; }
         public string BookTitle { get; set; }
         public string Publisher { get; set; }