Add tests for adding multiple years of weeks.
Use constant for offset from ISO 0. 
(I keep forgetting what it is!)
Correct resolvePreviousValid
Implement lengthOfMonth, add DAYS_PER_MONTH constant.
Add remaining missing 'default' overrides.
Correct test data/implementation for range
Change type used for comparison,
Override length of week/months in year.
implement rangeAlignedWeekOfMonth
Implement withDayOfYear.
Override range
Add constant for MONTHS_IN_YEAR, correct use for length of year.
Override getLong
Override getDayOfWeek
Override getProlepticMonth
Override implementation of with to deal with St. Tib's Day.
Tweak getLong(ALIGNED_WEEK_OF_YEAR)
Correct getDayOfWeek.
Correct some test data.
Flip test data, correct some.