pydata/pandas — pull request #5238 by jtratner (2013-10-16 01:06:04+00:00)
Title: CLN: Add _reset_cache method to PandasObject

I think this is the right way to do it. MI needs this for _engine and
friends. I think there are other objects that use `cache_readonly` that
might want to reset too.

I also moved the local dir methods off of StringMixin to PandasObject
(where they ought to have been)