Add Flask.config_class to changelog

CHANGES

@@ -18,6 +18,7 @@ Version 1.0
 - Added support for returning tuples in the form ``(response, headers)``
   from a view function.
 - Added :meth:`flask.Config.from_json`.
+- Added :attr:`flask.Flask.config_class`.
 
 Version 0.10.2
 --------------

flask/app.py

@@ -182,6 +182,8 @@ class Flask(_PackageBoundObject):
     #:
     #: 1. Default values for certain config options.
     #: 2. Access to config values through attributes in addition to keys.
+    #:
+    #: .. versionadded:: 1.0
     config_class = Config
 
     #: The debug flag.  Set this to `True` to enable debugging of the