Some built in unit types don't work

[bcowgill]

While evaluating this package, tried to create quantities of specific unit types and got some errors.

qty.version 1.0.1
length:
naut-mile: Qty(1 naut-mile) Error: Unit "naut-mile" not recognized
league: Qty(1 league) Error: Unit "league" not recognized
mass:
metric-ton: Qty(1 metric-ton) Error: Unit "metric-ton" not recognized
charge:
franklin: Qty(1 franklin) Error: Unit "franklin" not recognized