Split out web response classes into own files

osu.Game/Online/API/Requests/Responses/APIChangelogUser.cs

@@ -0,0 +1,28 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using Newtonsoft.Json;
+
+namespace osu.Game.Online.API.Requests.Responses
+{
+    public class APIChangelogUser
+    {
+        [JsonProperty("id")]
+        public long? Id { get; set; }
+
+        [JsonProperty("display_name")]
+        public string DisplayName { get; set; }
+
+        [JsonProperty("github_url")]
+        public string GithubUrl { get; set; }
+
+        [JsonProperty("osu_username")]
+        public string OsuUsername { get; set; }
+
+        [JsonProperty("user_id")]
+        public long? UserId { get; set; }
+
+        [JsonProperty("user_url")]
+        public string UserUrl { get; set; }
+    }
+}