add PullRequestReviewCommentReactionClient

Octokit.Reactive/Clients/IObservablePullRequestReviewCommentReactionsClient.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+
+namespace Octokit.Reactive
+{
+    public interface IObservablePullRequestReviewCommentReactionsClient
+    {
+        /// <summary>
+        /// Creates a reaction for a specified Pull Request Review Comment.
+        /// </summary>
+        /// <remarks>https://developer.github.com/v3/reactions/#create-reaction-for-a-pull-request-review-comment</remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="number">The comment id</param>
+        /// <param name="reaction">The reaction to create</param>
+        /// <returns></returns>
+        IObservable<Reaction> Create(string owner, string name, int number, NewReaction reaction);
+
+        /// <summary>
+        /// Get all reactions for a specified Pull Request Review Comment.
+        /// </summary>
+        /// <remarks>https://developer.github.com/v3/reactions/#list-reactions-for-a-pull-request-review-comment</remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="number">The comment id</param>        
+        /// <returns></returns>
+        IObservable<Reaction> GetAll(string owner, string name, int number);
+    }
+}