2012-12-02  Maciej Piechotka  <uzytkownik2@gmail.com>

	Small improvements to PriorityQueue

2012-11-25  Maciej Piechotka  <uzytkownik2@gmail.com>

	Fix Gee.List.Iterator.next

	PriorityQueue: fix segfault discovered during stress-testing
	If node P is removed then set P to R, as described in paper, instead of
	NULL.