Change history of accordion - yet another TclOO implementation

Rev	Date	Modified by	Minor edit	Spam	WikiText	Revert to
4	2018-04-03 13:59:12	JOB	no	no	4	4
3	2016-08-29 22:17:15	JOB	no	no	3	3
2	2016-07-29 19:05:46	dkf	no	no	2	2
1	2016-07-29 14:04:02	JOB	no	no	1	1
0	2016-07-29 13:58:33	JOB	no	no	0	0