Add distinction between units from the imperial system and the United States customary system in the units display names.
Submitted by Ivaylo Valkov
Link to original bug (#643589)
Description
At the Bulgarian translators' team mailing list, Roumen Petrov made the following suggestion:
Units from the imperial system and the United States customary system, that share the same name, should have some form of distinction in the units display names. This way it will be clearer for the user.
Version: git master