Adding statusText to response

closes #46

lib/adapters/http.js

@@ -65,6 +65,7 @@ module.exports = function httpAdapter(resolve, reject, config) {
           config.transformResponse
         ),
         status: res.statusCode,
+        statusText: res.statusMessage,
         headers: res.headers,
         config: config
       };

lib/adapters/xhr.js

@@ -42,6 +42,7 @@ module.exports = function xhrAdapter(resolve, reject, config) {
           config.transformResponse
         ),
         status: request.status,
+        statusText: request.statusText,
         headers: headers,
         config: config
       };