Version history

0.1.0

Subcommand feature added along with major refactoring in class' content. Many small changes to usage model, but backwards compatible.

0.0.3

Self-value operator "~" added. Parser for options including parameter settings, i.e. the Opt#params method added.

0.0.2

Opt#given is allowed an optinal block argument.

0.0.1

Initial version.