Organize classes better

Closes #94

Octokit/Models/Request/AuthorizationUpdate.cs

@@ -0,0 +1,35 @@
+using System.Collections.Generic;
+
+namespace Octokit
+{
+    /// <summary>
+    /// Used to create a new authorization.
+    /// </summary>
+    public class AuthorizationUpdate
+    {
+        /// <summary>
+        /// Replaces the authorization scopes with this list.
+        /// </summary>
+        public IEnumerable<string> Scopes { get; set; }
+
+        /// <summary>
+        /// A list of scopes to add to this authorization.
+        /// </summary>
+        public IEnumerable<string> AddScopes { get; set; }
+
+        /// <summary>
+        /// A list of scopes to remove from this authorization.
+        /// </summary>
+        public IEnumerable<string> RemoveScopes { get; set; }
+
+        /// <summary>
+        /// An optional note to remind you what the OAuth token is for.
+        /// </summary>
+        public string Note { get; set; }
+
+        /// <summary>
+        // An optional URL to remind you what app the OAuth token is for.
+        /// </summary>
+        public string NoteUrl { get; set; }
+    }
+}