[WIP] Add new Project API Preview (#1480)

Add Projects API client (preview)

Octokit/Models/Request/ProjectCardUpdate.cs

@@ -0,0 +1,27 @@
+using System.Diagnostics;
+using System.Globalization;
+
+namespace Octokit
+{
+    [DebuggerDisplay("{DebuggerDisplay,nq}")]
+    public class ProjectCardUpdate
+    {
+        public ProjectCardUpdate(string note)
+        {
+            Note = note;
+        }
+
+        /// <summary>
+        /// The new note of the card.
+        /// </summary>
+        public string Note { get; private set; }
+
+        internal string DebuggerDisplay
+        {
+            get
+            {
+                return string.Format(CultureInfo.InvariantCulture, "Note: {0}", Note);
+            }
+        }
+    }
+}