Fixed: (Exoticaz) Category parsing kills search/feed

Fixes #938

src/NzbDrone.Core/Indexers/Definitions/Avistaz/AvistazApi.cs

@@ -8,7 +8,7 @@ namespace NzbDrone.Core.Indexers.Definitions.Avistaz
     {
         public string Url { get; set; }
         public string Download { get; set; }
-        public string Category { get; set; }
+        public Dictionary<string, string> Category { get; set; }
 
         [JsonProperty(PropertyName = "movie_tv")]
         public AvistazIdInfo MovieTvinfo { get; set; }

src/NzbDrone.Core/Indexers/Definitions/ExoticaZ.cs

@@ -65,7 +65,7 @@ namespace NzbDrone.Core.Indexers.Definitions
         {
             var cat = row.Category;
 
-            return _categories.MapTrackerCatToNewznab(cat).ToList();
+            return cat.SelectMany(c => _categories.MapTrackerCatToNewznab(c.Key)).ToList();
         }
     }
 }