Add the Delete functionality into the CarePlan Proxy
Allow the retrieval of the Text of a question in a thing the same way
that it is possible from the type.
IN PROGRESS - issue YZABP-646: Add Blood Glucose Measurement broken -
not output at all, overlay does not load. 
https://illuminadev.co.uk/jira/browse/YZABP-646

Bring the validation up to the Symfony 2.3 level
Remove stray debug from CarePlan
Better handling of the case where the number of calories is empty.
Add in a workaround for the erroneous "updated-end-date" tag in
Condition things.
Do not set the codable value text to be "Unknown" if the text is empty.
Set the "thingType" for the AnyThing proxy to be "Any", ensuring that
the validation works.
Bring in the latest changes from the Healthvault documentation.
Remove the workaround
Appointment thing proxy added. (WIP)