Merge pull request #200 from AurelioDeRosa/patch-1

Expose XHR instance

lib/adapters/xhr.js

@@ -69,7 +69,8 @@ module.exports = function xhrAdapter(resolve, reject, config) {
       status: request.status === 1223 ? 204 : request.status,
       statusText: request.status === 1223 ? 'No Content' : request.statusText,
       headers: responseHeaders,
-      config: config
+      config: config,
+      request: request
     };
 
     // Resolve or reject the Promise based on the status