Implement observable repository content client

Octokit.Reactive/Clients/IObservableRepositoryContentsClient.cs

@@ -1,7 +1,11 @@
 using System;
+using System.Reactive;
 
 namespace Octokit.Reactive
 {
+    /// <summary>
+    /// Client for accessing contents of files within a repository as base64 encoded content.
+    /// </summary>
     public interface IObservableRepositoryContentsClient
     {
         /// <summary>
@@ -19,5 +23,48 @@ namespace Octokit.Reactive
         /// <param name="name">The name of the repository</param>
         /// <returns></returns>
         IObservable<string> GetReadmeHtml(string owner, string name);
+
+        /// <summary>
+        /// Returns the contents of a file or directory in a repository.
+        /// </summary>
+        /// <remarks>
+        /// If given a path to a single file, this method returns a collection containing only that file.
+        /// </remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="path">The content path</param>
+        /// <returns>
+        /// A collection of <see cref="RepositoryContent"/> representing the content at the specified path
+        /// </returns>
+        IObservable<RepositoryContent> GetContents(string owner, string name, string path);
+
+        /// <summary>
+        /// Creates a commit that creates a new file in a repository.
+        /// </summary>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="path">The path to the file</param>
+        /// <param name="request">Information about the file to create</param>
+        /// <returns></returns>
+        IObservable<RepositoryContentChangeSet> CreateFile(string owner, string name, string path, CreateFileRequest request);
+
+        /// <summary>
+        /// Creates a commit that updates the contents of a file in a repository.
+        /// </summary>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="path">The path to the file</param>
+        /// <param name="request">Information about the file to update</param>
+        /// <returns>The updated content</returns>
+        IObservable<RepositoryContentChangeSet> UpdateFile(string owner, string name, string path, UpdateFileRequest request);
+
+        /// <summary>
+        /// Creates a commit that deletes a file in a repository.
+        /// </summary>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="path">The path to the file</param>
+        /// <param name="request">Information about the file to delete</param>
+        IObservable<Unit> DeleteFile(string owner, string name, string path, DeleteFileRequest request);
     }
 }