I've been writing a few unix scripts recently. I'm very much feeling the
need for a framework that will let me build scripts and not worry about
such common functionality as:

  * providing parameters through the command line and config files, or
falling back to program specified defaults.
  * getting help on command usage (perhaps via embedded rdoc).

I would imagine there is a developed framework out there to do this kind
of thing?

Cheers,
  Benjohn