0.9.0:
	* Move 'validate' to .JSON as 'parse'.

0.5.0:
	* Changed the parser/doc type to use StateT m. So now you can use
	monads as part of your consumers.

0.2.0:
	* Change the type of flag.
	* Add the switch combinator (used to be “flag”).
	* Add the “stop” combinator.

0.1.1:
	* Printer fix for options consumer.

0.1.0:
	* Change to Result type which supports Continued constructor.
