API DateTime.Ago better infers significance of date units.
BUG Fixes missing i18n translation in Date::TimeDiffIn
BUG Fixes Date::TimeDiffIn not respecting mocked SS_Datetime::now
This provides less vague date periods. I.e. "36 days" has a lot more relevance that "1 month"
Reduced duplication of time period calculation code
(ref: CWPBUG-141)
Merge pull request #3025 from tractorcow/pulls/3.2-date-relevance

API DateTime.Ago better infers significance of date units.