Label promises
Merge pull request #1578 from teddyzeenny/promise-labels

Label promises
Minor yuidoc syntax fixes for DS.RESTSerializer
- remove `<Object>` which was generating invalid html
- add closing " to json example
- add missing brackets around param and return types
Document DS.JSONSerializer
Merge pull request #1587 from bmac/rest-serializer-docs

Minor yuidoc syntax fixes for DS.RESTSerializer
Merge pull request #1586 from bmac/json-serializer-docs

Document DS.JSONSerializer
add DS.Errors object