Writing to string should use the `ObjectMapper` not `toString()` method.
 - Though it's not clear from looking at the source code, it appears that toString does not honor JAXB or Jackson2 annotations as defined in the jackson spec.
Cleanup exception throwing
Merge pull request #3 from GlobalTechnology/jackson-serialize-honor-annotations

(Jackson Serialize) Writing to string should use the `ObjectMapper` not `toString()`.