First release of the arghandler library

This is the official debut of arghandler - an extension to argparse that adds high-level features that take a bunch of boilerplate code to make work with argparse alone. The two key capabilities provided in this release are:

• declaring and supporting subcommands (e.g., git pull) with basically zero-lines of code
• support for auto-configuring the logging level based on a configurable command-line argument

arghandler works with all modern installations of python. Give it a try!