Adding observable commit status client

Octokit.Reactive/Clients/IObservableCommitStatusClient.cs

@@ -0,0 +1,28 @@
+using System;
+
+namespace Octokit.Reactive
+{
+    public interface IObservableCommitStatusClient
+    {
+        /// <summary>
+        /// Retrieves commit statuses for the specified reference. A reference can be a commit SHA, a branch name, or
+        /// a tag name.
+        /// </summary>
+        /// <remarks>Only users with pull access can see this.</remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="reference">The reference (SHA, branch name, or tag name) to list commits for.</param>
+        /// <returns></returns>
+        IObservable<CommitStatus> GetAll(string owner, string name, string reference);
+
+        /// <summary>
+        /// Creates a commit status for the specified ref.
+        /// </summary>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="reference">The reference (SHA, branch name, or tag name) to list commits for.</param>
+        /// <param name="commitStatus">The commit status to create.</param>
+        /// <returns></returns>
+        IObservable<CommitStatus> Create(string owner, string name, string reference, NewCommitStatus commitStatus);
+    }
+}