Support for ImageService3

Also added new ImageService2Reference that inherits from ResourceBase so we can use the Profile property

src/IIIF/IIIF/ImageApi/Service/ImageService3.cs

@@ -0,0 +1,37 @@
+using IIIF.Presentation.V3;
+using Newtonsoft.Json;
+using System.Collections.Generic;
+
+namespace IIIF.ImageApi.Service
+{
+    public class ImageService3 : ResourceBase, IService
+    {
+        public const string Image3Context = "http://iiif.io/api/image/3/context.json";
+        public const string ImageProtocol = "http://iiif.io/api/image";
+
+        public ImageService3()
+        {
+            Context = Image3Context;
+        }
+
+        public override string Type => nameof(ImageService3);
+
+        [JsonProperty(Order = 3)]
+        public string Protocol => ImageProtocol;
+
+        [JsonProperty(Order = 11)]
+        public int Width { get; set; }
+
+        [JsonProperty(Order = 12)]
+        public int Height { get; set; }
+
+        [JsonProperty(Order = 13)]
+        public List<Size> Sizes { get; set; }
+
+        [JsonProperty(Order = 14)]
+        public List<Tile> Tiles { get; set; }
+
+        [JsonProperty(Order = 30)]
+        public List<string> ExtraFeatures { get; set; }
+    }
+}

src/IIIF/IIIF/Presentation/V2/ImageService2Reference.cs

@@ -0,0 +1,14 @@
+using IIIF.ImageApi.Service;
+using System;
+
+namespace IIIF.Presentation.V2
+{
+    public class ImageService2Reference : ResourceBase, IService
+    {
+        public override string Type 
+        { 
+            get => nameof(ImageService2);
+            set => throw new NotImplementedException(); 
+        }
+    }
+}

src/IIIF/IIIF/Presentation/V3/ImageService3Reference.cs

@@ -0,0 +1,9 @@
+using IIIF.ImageApi.Service;
+
+namespace IIIF.Presentation.V3
+{
+    public class ImageService3Reference : ResourceBase, IService
+    {
+        public override string Type => nameof(ImageService3);
+    }
+}