DJUTILS serialization of data structures

Element	Missed Instructions	Cov.	Missed Branches	Cov.	Missed	Cxty	Missed	Lines	Missed	Methods	Missed	Classes
Total	611 of 13,887	95%	89 of 540	83%	81	576	126	2,034	18	303	1	66
org.djutils.serialization		95%		83%	81	576	126	2,034	18	303	1	66