Lots of confusing properties on time-granularity types #103

The time-granularity types (i.e. LocalDateTime, LocalTime, OffsetDateTime, 
ZonedDateTime) contain a large number of similar-sounding properties:

- MillisecondOfDay
- SecondOfDay
- TickOfDay
- TickOfSecond
- Tick

'Tick' is also misnamed: it's actually 'TickOfMillisecond'. But more 
importantly, it's not clear that all of these are actually useful.