Versions couldn't be displayed if accessed directly via a node's sub-resource.
Cleaning things up. Using @XmlElement on instance variable for all JSONSubElementContainer subclasses. Removed extraneous annotations that were not used.
Fixed missing type link.
Major content update:
  - rewrote most examples,
  - re-organized content,
  - added section on basic API workflow,
  - added bit about "rel" property in links,
  - added mention about order of elements in representations being irrelevant
  - added section on authentication
  - added examples in entry point section to show all operations at least once