Fix bug introduced in 9f38bc0d0f

The species cultivar formatter was being called on all updates
not just on species updates
Merge pull request #65 from ahinz/bug/cultivar

Fix bug introduced in 9f38bc0d0f
Use impl settings for localized unit values
Merge pull request #66 from ahinz/topic/localize-bvalues

Use impl settings for localized unit values