tidy up some xml-docs while i'm in here

Octokit/Http/ApiResponse.cs

@@ -1,11 +1,24 @@
 namespace Octokit.Internal
 {
+    /// <summary>
+    /// Wrapper for a response from the API
+    /// </summary>
+    /// <typeparam name="T">Payload contained in the response</typeparam>
     public class ApiResponse<T> : IApiResponse<T>
     {
+        /// <summary>
+        /// Create a ApiResponse from an existing request
+        /// </summary>
+        /// <param name="response">An existing request to wrap</param>
         public ApiResponse(IResponse response) : this(response, GetBodyAsObject(response))
         {
         }
 
+        /// <summary>
+        /// Create a ApiResponse from an existing request and object
+        /// </summary>
+        /// <param name="response">An existing request to wrap</param>
+        /// <param name="bodyAsObject">The payload from an existing request</param>
         public ApiResponse(IResponse response, T bodyAsObject)
         {
             Ensure.ArgumentNotNull(response, "response");
@@ -14,8 +27,14 @@
             Body = bodyAsObject;
         }
 
+        /// <summary>
+        /// The payload of the response
+        /// </summary>
         public T Body { get; private set; }
 
+        /// <summary>
+        /// The context of the response
+        /// </summary>
         public IResponse HttpResponse { get; private set; }
 
         static T GetBodyAsObject(IResponse response)