argparse 0.6.0

New features:

• An array of functions can now be as the value of convert property,
  so that multi-argument options can use different conversion rules
  for different arguments (#14).
• Mutexes can now include positional arguments (#11).
• Added hidden property for arguments, options and commands,
  removing them from the autogenerated usage and help strings.
• Added :group(name, ...) method to Parser and Command objects, allowing
  custom grouping of arguments, options, and commands in autogenerated
  help string.
• Added help_vertical_space property for configuring number of extra
  newlines between help strings for different arguments and options in
  autogenerated help string.
• Added usage_margin and usage_max_width properties for configuring
  usage string autogeneration.
• Added help_usage_margin and help_description_margin properties
  for configuring help string autogeneration.
• Added help_max_width property. If set, descriptions in help string
  are automatically wrapped to fit into given number of columns.
• Argparse version is now available as argparse.version.

Improvements:

• -- can now be used as a normal option name, with arguments
  after -- always passed to it verbatim (#17).
• When generating help messages for options with arguments and multiple
  aliases, usage strings for different aliases are put on separate lines and
  vertically aligned (#15).