WIP checkin for getting last ApiInfo object

Octokit/GitHubClient.cs

@@ -100,6 +100,12 @@ namespace Octokit
             Deployment = new DeploymentsClient(apiConnection);
         }
 
+        /// <summary>
+        /// Gets the latest API Info - this will be null if no API calls have been made
+        /// </summary>
+        /// <returns><seealso cref="ApiInfo"/> representing the information returned as part of an Api call</returns>
+        public ApiInfo LastApiInfo { get { return Connection.LastApiInfo; } }
+
         /// <summary>
         /// Convenience property for getting and setting credentials.
         /// </summary>