Log Message:
Import py27-configargparse-0.9.3 as wip/py-configargparse.

Applications with more than a handful of user-settable options are best
configured through a combination of command line args, config files,
hard-coded defaults, and in some cases, environment variables.

Python's command line parsing modules like argparse have very limited support
for config files and environment variables, so this module extends argparse to
add these features.