Rename to Octokit to be consistent with other API libs

GitHub is naming all of the libraries Octokit for their respective
platforms

Octokit/Http/ReadOnlyPagedCollection.cs

@@ -0,0 +1,31 @@
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Threading.Tasks;
+
+namespace Octokit.Http
+{
+    public class ReadOnlyPagedCollection<T> : ReadOnlyCollection<T>, IReadOnlyPagedCollection<T>
+    {
+        readonly IConnection connection;
+        readonly ApiInfo info;
+
+        public ReadOnlyPagedCollection(IResponse<List<T>> response, IConnection connection)
+            : base(response != null ? response.BodyAsObject : null)
+        {
+            Ensure.ArgumentNotNull(response, "response");
+            Ensure.ArgumentNotNull(connection, "connection");
+
+            this.connection = connection;
+            info = response.ApiInfo;
+        }
+
+        public async Task<IReadOnlyPagedCollection<T>> GetNextPage()
+        {
+            var nextPageUrl = info.GetNextPageUrl();
+            if (nextPageUrl == null) return null;
+
+            var response = await connection.GetAsync<List<T>>(nextPageUrl);
+            return new ReadOnlyPagedCollection<T>(response, connection);
+        }
+    }
+}