Fix changes.xml
Fix Javadoc
Add Days.ofWeeks(int)

See #4
Allow Days.from(TemporalAmount) to accept WEEKS

See #4
Allow Days.parse(CharSequence) to accept weeks

See #4
Support weeks in Days

Fixes #4
Add Months.ofYears(int)

See #5
Allow Months.from(TemporalAmount) to accept YEARS

See #5
Allow Months.parse(CharSequence) to accept years

See #5
Support years in Months

Fixes #5