Command line processing

Many server-side tools use a command line as their interface, and there should be a high-level way to deal with the arguments.

Prior Art

v8cgi's GetOpt module
Microsoft WshArguments object in the Windows Script Host environment.
- CommandLine object, by Olivier Mengué, a generic API to Unix-style parsed arguments with a concrete JavaScript implementation on top of WshArguments (CScriptCommandLine).
Python's optparse module provides a reasonably powerful, flexible and full-featured option parser.