MarionL - solved the json return problem.

Fixed the problem I was having not returning json payloads back. Turns
out you need to register a json provider. I settled on
wink-json-provider, which auto registers when you add the jars to the
classpath and only requires to annotate your webservice model classes as
jaxb elements (XMLRootElement). This fix convieniently addressed the 406
authorization problem for free as well! Fixed a few other minor defects
(get/set inconsistencies) in the mapper.