Added basic tests for Qty.getPrefixes, Qty.getKinds and Qty.getUnits.
Implemented Qty.getPrefixes, Qty.getKinds and Qty.getUnits.
Wrote missing documentation for Qty.getUnits.
Refactor Qty.getKinds()
Do not yet include getUnits and getPrefixes
Merge branch 'kinds'
Support browsers without Number.isFinite()