Adding IObservableUserEmailsClient and...

default implementation. Still needs delete method which is skipped
because it's a HTTP DELETE. There's currently nothing in the
ApiConnection to handle this scenario and it's a rather unorthodox thing
to support.
delete.

Octokit.Reactive/Clients/IObservableUserEmailsClient.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+
+
+namespace Octokit.Reactive
+{
+    /// <summary>
+    /// A client for GitHub's User Emails API.
+    /// </summary>
+    /// <remarks>
+    /// See the <a href="http://developer.github.com/v3/users/emails/">User Emails API documentation</a> for more information.
+    /// </remarks>
+    public interface IObservableUserEmailsClient
+    {
+        /// <summary>
+        /// Gets all email addresses for the authenticated user.
+        /// </summary>
+        /// <remarks>
+        /// http://developer.github.com/v3/users/emails/#list-email-addresses-for-a-user
+        /// </remarks>
+        /// <returns>The <see cref="EmailAddress"/>es for the authenticated user.</returns>
+        [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate")]
+        IObservable<EmailAddress> GetAll();
+
+        /// <summary>
+        /// Adds email addresses for the authenticated user.
+        /// </summary>
+        /// <remarks>
+        /// http://developer.github.com/v3/users/emails/#add-email-addresses
+        /// </remarks>
+        /// <param name="emailAddresses">The email addresses to add.</param>
+        /// <returns>Returns the added <see cref="EmailAddress"/>es.</returns>
+        IObservable<string> Add(params string[] emailAddresses);
+    }
+}