Merge from vendor branch TNF:

Merge from vendor branch TNF:
Import py26-argparse-1.1 as devel/py-argparse.

The argparse module provides an easy, declarative interface for
creating command line tools, which knows how to:

    * parse the arguments and flags from sys.argv
    * convert arg strings into objects for your program
    * format and print informative help messages
    * and much more...