0.04	2013-07-24
	Other
	* Only call unget() from new() if needed

0.03	2013-07-19
	Other
	* Simplified peek() by moving logic to the iterator created in unget()
	* More tests

0.02	2013-07-17
	Feature Changes
	* Implement as blessed hash to allow sub-classing

0.01  2013-07-15
	* original version