2: Do we need AbstractMeasurement in RI? 

Task-Url: https://github.com/unitsofmeasurement/unit-ri/issues/issue/2
UCUM repairs to fix errors, mainly changing the order of operations to ensure ProductUnits are returned where needed as some calculations were returning TransformedUnits (multiply/divide on raw numbers) which were breaking in the ProductUnit constructor.
ATOMIC_MASS_UNIT still might be a problem, I fixed this by creating it as an instance of  SI.UNIFIED_ATOMIC_MASS as that is what it's defined as, I believe, creating it as an AlternateUnit is not possible due to UAM not being a proper SI unit.
REM is also a potential issue, I could not create it as an alternate of RAD as they have different quantities.
BARN also needs checking as I can't tell whether the way it is now structured still returns the right result.
5: Improve demos 

Task-Url:
https://github.com/unitsofmeasurement/unit-demos/issues/issue/5
14: Verify that implementation works across all SE 8 Profiles 
Tagging
Task-Url:
https://github.com/unitsofmeasurement/unit-impl-se/issues/issues/issue/14
Merge pull request #16 from GeoffCapper/master

UCUM repairs to fix errors, mainly changing the order of operations to e...
1: JIRA Placeholder 
Fixed broken tests
Task-Url:
https://github.com/unitsofmeasurement/unitsofmeasurement-parent/issues/issues/issue/1
14: Verify that implementation works across all SE 8 Profiles 
Updating dimensions
Task-Url:
https://github.com/unitsofmeasurement/unit-impl-se/issues/issues/issue/14
14: Verify that implementation works across all SE 8 Profiles 
Updated JavaDoc
Task-Url:
https://github.com/unitsofmeasurement/unit-impl-se/issues/issues/issue/14