20: Refactor concrete classes 

Task-Url: https://github.com/unitsofmeasurement/unit-ri/issues/issue/20
UNITSOFMEASUREMENT-10: Java 8 issues 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-10
UNITSOFMEASUREMENT-8: Could remove BiFactory from API 
Renamed "builder" method to build()
Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-8
UNITSOFMEASUREMENT-24: Move arithmetic operations and getValue() from
Measurement to Quantity 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-24
UNITSOFMEASUREMENT-24: Move arithmetic operations and getValue() from
Measurement to Quantity 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-24
UNITSOFMEASUREMENT-24: Move arithmetic operations and getValue() from
Measurement to Quantity 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-24
UNITSOFMEASUREMENT-24: Move arithmetic operations and getValue() from
Measurement to Quantity 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-24
UNITSOFMEASUREMENT-25: Adjust spec document to recent code changes 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-25
UNITSOFMEASUREMENT-24: Move arithmetic operations and getValue() from
Measurement to Quantity 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-24
UNITSOFMEASUREMENT-31: Remove javax.measure.util.TimedData 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-31
UNITSOFMEASUREMENT-30: Remove javax.measure.util.Range 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-30
UNITSOFMEASUREMENT-33: Remove javax.measure.util Package 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-33
UNITSOFMEASUREMENT-13: Do we need AbstractMeasurement in RI? 

Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-13