This library provides an easy way to define command line parsers.
Most users will want to use the "System.Console.CmdArgs.Implicit"
module, whose documentation contains an example.

* "System.Console.CmdArgs.Explicit" provides a way to write command
  line parsers for both single mode programs (most programs) and
  multiple mode programs (e.g. darcs or cabal). Parsers are defined
  by constructing a data structure.

* "System.Console.CmdArgs.Implicit" provides a way to concisely
  define command line parsers, up to three times shorter than getopt.
  These parsers are translated into the Explicit data type.

* "System.Console.CmdArgs.GetOpt" provides a wrapper allowing
  compatiblity with existing getopt parsers, mapping to the Explicit
  data type.
