JAXB POJO mapper is up and running.  Also converted ConversionException to a checked exception

Planning to try a different way to convert to JDOM before I mark the issue as fixed.

Signed-off-by: gburgett <gordon.burgett@gmail.com>
fixes #5 - Create JAXB PojoMapper implementation

Added XMLStreamReader and XMLStreamWriter that read and write to JDOM documents.

Signed-off-by: gburgett <gordon.burgett@gmail.com>
Merge branch 'master' of github.com:gburgett/XFlat