Implement AssigneesClient

Implement client to list and check available assignees for a repository

Octokit/Http/ApiConnection.cs

@@ -38,7 +38,7 @@ namespace Octokit
         /// <summary>
         /// Gets the connection for making HTTP requests.
         /// </summary>
-        protected IConnection Connection { get; private set; }
+        public IConnection Connection { get; private set; }
 
         /// <summary>
         /// Gets the API resource at the specified URI.

Octokit/Http/IApiConnection.cs

@@ -11,6 +11,11 @@ namespace Octokit
     /// </summary>
     public interface IApiConnection
     {
+        /// <summary>
+        /// The underlying connection.
+        /// </summary>
+        IConnection Connection { get; }
+
         /// <summary>
         /// Gets the API resource at the specified URI.
         /// </summary>