Add the fix for #997 to the changelog

CHANGELOG.rst

@@ -10,6 +10,8 @@ Changelog
 - **Add** ``Script.get_context`` to get information where you currently are.
 - Goto on a function/attribute in a class now goes to the definition in its
   super class.
+- Completion for "proxies" works now. These are classes that have a
+  ``__getattr__(self, name)`` method that does a ``return getattr(x, name)``.
 - Big **Script API Changes**:
     - The line and column parameters of ``jedi.Script`` are now deprecated
     - ``completions`` deprecated, use ``complete`` instead