Add Date Type

[eeverman]

There is already a LocalDateTime, so task is a lot of copy/paste.

If you are unfamiliar with the project, please look over the AndHow Site to get a basic understanding of what AndHow is, in particular, how Properties are used.

For this task:

• Be sure to work from the main branch
• Create a new LocalDateType, similar to LocalDateTimeType except based on java.time.LocalDate.
• Create a new LocalDateValidator, similar to LocalDateTimeValidator, but using the java.time.LocalDate type.
• Create a new LocalDateProp, similar to LocalDateTimeProp, except using your new LocalDateType and LocalDateValidator, and basically replacing references to LocalDateTime to LocalDate.
• Create new tests for each class (can be copied from existing test classes)