metomi/isodatetime — pull request #31 by benfitzpatrick (2014-04-02 11:46:36+00:00)
Title: strptime/strftime: remove %y support.

This has been removed since the POSIX standard
requires guessing the century from a %y strptime,
and also states that the method of guessing may
change in future standards. This is too unstable
to use.

@matthewrmshin, please review.

Tests pass.