Added doc comment for property

Octokit.Reactive/Clients/IObservableRepositoriesClient.cs

@@ -89,6 +89,14 @@ namespace Octokit.Reactive
         /// <returns></returns>
         IObservable<string> GetReadmeHtml(string owner, string name);
 
+        /// <summary>
+        /// A client for GitHub's Commit Status API.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/statuses/">Commit Status API documentation</a> for more
+        /// details. Also check out the <a href="https://github.com/blog/1227-commit-status-api">blog post</a> 
+        /// that announced this feature.
+        /// </remarks>
         IObservableCommitStatusClient CommitStatus { get; }
     }
 }