Fix the GeneralMeasurement type so that Healthvault CodableValue
reference doesn't clash with the proxy type.
Merge remote-tracking branch 'origin/pep'
Create a factory to create proxies from Things.

Currently the mapping is hard-coded, although new/replacement entries
can be defined by implementing "registerProxies" in the configuration
class.
Merge remote-tracking branch 'origin/pep'
Create the ThingFactory, as a way of retrieving things by ID (and
cacheing them)
Merge remote-tracking branch 'origin/master' into pep
Added HbA1C thing proxy.