Add test for bad dateYearDay
Add tests for leap year.
Add length of month (leap related)
Format for whitespace.
Override PaxDate.date(Era, year, month, day) for documentation.
Override PaxDate.dateYearDay(Era, year,day) for documentation.
Add/modify tests for eras.
Add test for Chronology.range
Add tests for PaxDate.range
Correct era test (use correct ones)
Add tests for getLong
Add tests for with