[PLAT-1415] Add new LocalDateDouble TS implementation
[PLAT-1415] Enhance tests
[PLAT-1415] Add new LocalDateDouble TS implementation
[PLAT-1415] Optimise use of mutable time-series classes
[PLAT-1415] Enhance tests
[PLAT-1415] Javadoc
[PLAT-1415] Make operate methods public
[PLAT-1415] Javadoc
[PLAT-1415] Remove unused test class
[PLAT-1415] Add new LocalDateObject TS implementation
[PLAT-1415] Test new LocalDateObject TS implementation