Implement labels CRUD

Octokit/Models/Request/NewLabel.cs

@@ -0,0 +1,24 @@
+namespace Octokit
+{
+    /// <summary>
+    /// Describes a new label to create via the <see cref="IIssuesLabelsClient.Create(string,string,NewLabel)"/> method.
+    /// </summary>
+    public class NewLabel
+    {
+        public NewLabel(string name, string color)
+        {
+            Name = name;
+            Color = color;
+        }
+
+        /// <summary>
+        /// Name of the label (required)
+        /// </summary>
+        public string Name { get; set; }
+
+        /// <summary>
+        /// Color of the label (required)
+        /// </summary>
+        public string Color { get; set; }
+    }
+}