UNITSOFMEASUREMENT-117: Add Tests according to Spec Chapter 2  Updating usage demo  Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-117
UNITSOFMEASUREMENT-117: Add Tests according to Spec Chapter 2 
Updating usage demo 
Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-117
unitsofmeasurement/unit-tck-usage