Changed three letter shortenings to tam -> tammi and so forth
Merge pull request #585 from bleadof/feature/lang-short

Changed three letter shortenings to tam -> tammi and so forth
Merge branch 'feature/lang-short' into develop

* feature/lang-short:
  Changed three letter shortenings to tam -> tammi and so forth
Added support for duration object creation through iso-8601 spec