simple argparse wrapper (Python 2)

 Argh provides a very simple wrapper for argparse.
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 Argparse is a very powerful tool; argh just makes it easy to use.
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 Here’s a list of features that argh adds to argparse:
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  * mark a function as a CLI command and specify its arguments before
    the parser is instantiated;
  * nested commands made easy: no messing with subparsers;
  * infer command name from function name;
  * infer argument type from the default value;
  * infer argument action from the default value (for booleans);
  * infer arguments from function signature;
  * add an alias root command help for the --help argument;
  * enable passing unwrapped arguments to certain functions instead of
    an argparse.Namespace object.
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 Argh is fully compatible with argparse. You can mix argh-agnostic and
 argh-aware code. Just keep in mind that dispatch() does some extra
 work that a custom dispatcher may not do.
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 This package installs the library for Python 2.