version of dict that keeps keys in sorted order
This is an implementation of an ordered dictionary with Key Insertion
Order (KIO: updates of values do not affect the position of the key),
Key Value Insertion Order (KVIO, an existing key?s position is removed
and put at the back). The standard library module OrderedDict,
implemented later, implements a subset of ordereddict functionality.

Maintainer: The OpenBSD ports mailing-list <ports@openbsd.org>

WWW: https://pypi.python.org/pypi/ruamel.ordereddict
